diff --git a/BE/src/main/java/org/example/controllers/SearchController.java b/BE/src/main/java/org/example/controllers/SearchController.java
new file mode 100644
index 0000000..5bbbfb7
--- /dev/null
+++ b/BE/src/main/java/org/example/controllers/SearchController.java
@@ -0,0 +1,29 @@
+package org.example.controllers;
+
+
+import ch.qos.logback.core.joran.sanity.Pair;
+import org.example.models.Post;
+import org.example.models.User;
+import org.example.objects.SearchResultDTO;
+import org.example.services.SearchService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/search")
+public class SearchController {
+    @Autowired
+    private final SearchService searchService;
+
+    public SearchController(SearchService searchService) {
+        this.searchService = searchService;
+    }
+
+    @GetMapping("/get")
+    public List<Post> search(@RequestParam("condition") String condition) {
+        System.out.println(condition);
+        return searchService.searchResult(condition);
+    }
+}
diff --git a/BE/src/main/java/org/example/objects/SearchResultDTO.java b/BE/src/main/java/org/example/objects/SearchResultDTO.java
new file mode 100644
index 0000000..6c1246b
--- /dev/null
+++ b/BE/src/main/java/org/example/objects/SearchResultDTO.java
@@ -0,0 +1,36 @@
+package org.example.objects;
+
+import org.example.models.Post;
+import org.example.models.User;
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.web.bind.annotation.GetMapping;
+
+public class SearchResultDTO {
+    @Id
+    @GeneratedValue
+    private  Long id;
+    private User user;
+    private Post post;
+
+    public SearchResultDTO(Post post, User user) {
+        this.user = user;
+        this.post = post;
+    }
+
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
+    public Post getPost() {
+        return post;
+    }
+
+    public void setPost(Post post) {
+        this.post = post;
+    }
+}
diff --git a/BE/src/main/java/org/example/repositories/CategoryRepository.java b/BE/src/main/java/org/example/repositories/CategoryRepository.java
index f4447c8..613a9b4 100644
--- a/BE/src/main/java/org/example/repositories/CategoryRepository.java
+++ b/BE/src/main/java/org/example/repositories/CategoryRepository.java
@@ -20,4 +20,7 @@ public interface CategoryRepository extends Neo4jRepository<Category, Long> {
             "OPTIONAL MATCH (p)-[:HAS_VIDEO]->(video:Video)\n" +
             "RETURN ID(p)")
     List<Long> findPostsByCategoryNames(@Param("categoryName") String categoryName);
+
+    @Query("MATCH (post:Post)-[HAS_CATEGORY]->(cate:Category) WHERE ID(post)=$postId return cate")
+    Category getCategory(@Param("postId") Long postId);
 }
diff --git a/BE/src/main/java/org/example/repositories/PostRepository.java b/BE/src/main/java/org/example/repositories/PostRepository.java
index b684ca5..970b45a 100644
--- a/BE/src/main/java/org/example/repositories/PostRepository.java
+++ b/BE/src/main/java/org/example/repositories/PostRepository.java
@@ -1,6 +1,7 @@
 package org.example.repositories;
 
 import org.example.controllers.UserController;
+import org.example.models.Category;
 import org.example.models.Image;
 import org.example.models.Post;
 import org.example.queryresults.PostQueryResult;
@@ -28,6 +29,8 @@ public interface PostRepository extends Neo4jRepository<Post,Long> {
                 "return image.filename")
         String getImage(@Param("postId") Long postId);
 
+
+
         @Query("MATCH (p:Post ) where ID(p)=$postId \n" +
                 "SET p.title = $title,\n" +
                 "    p.content = $content\n" +
diff --git a/BE/src/main/java/org/example/repositories/SearchRepository.java b/BE/src/main/java/org/example/repositories/SearchRepository.java
new file mode 100644
index 0000000..7ab88b7
--- /dev/null
+++ b/BE/src/main/java/org/example/repositories/SearchRepository.java
@@ -0,0 +1,23 @@
+package org.example.repositories;
+
+import ch.qos.logback.core.joran.sanity.Pair;
+import org.example.models.Post;
+import org.example.models.User;
+import org.example.objects.SearchResultDTO;
+import org.springframework.data.neo4j.repository.Neo4jRepository;
+import org.springframework.data.neo4j.repository.query.Query;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+@Repository
+public interface SearchRepository extends Neo4jRepository<Post,Long> {
+    @Query("MATCH (p:Post)<-[:createPost]-(u:User)\n" +
+            "WHERE p.title CONTAINS $condition OR p.content CONTAINS $condition OR u.username CONTAINS $condition \n" +
+            "RETURN p \n")
+    List<Post> search(@Param("condition") String condition);
+}
diff --git a/BE/src/main/java/org/example/services/RecommendationService.java b/BE/src/main/java/org/example/services/RecommendationService.java
index e35b5d0..ce3b17b 100644
--- a/BE/src/main/java/org/example/services/RecommendationService.java
+++ b/BE/src/main/java/org/example/services/RecommendationService.java
@@ -37,7 +37,7 @@ public class RecommendationService {
         for (Post post : postsInteracts) {
             post.setImgUrl(postRepository.getImage(post.getId()));
             recommendationPosts.add(post);
-        }
+        }                                                   
         //tìm kiếm các bài post có chung chủ đề
        List<String> categoriesNames = userRepository.findInteractedCategories(username);
         for (String categoryName : categoriesNames) {
diff --git a/BE/src/main/java/org/example/services/SearchService.java b/BE/src/main/java/org/example/services/SearchService.java
new file mode 100644
index 0000000..7376a67
--- /dev/null
+++ b/BE/src/main/java/org/example/services/SearchService.java
@@ -0,0 +1,40 @@
+package org.example.services;
+
+
+import ch.qos.logback.core.joran.sanity.Pair;
+import org.example.models.Post;
+import org.example.models.User;
+import org.example.objects.SearchResultDTO;
+import org.example.repositories.CategoryRepository;
+import org.example.repositories.PostRepository;
+import org.example.repositories.SearchRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Service
+public class SearchService {
+    @Autowired
+    private final SearchRepository searchRepository;
+    @Autowired
+    private final PostRepository postRepository;
+    @Autowired
+    private final CategoryRepository categoryRepository;
+
+    public SearchService(SearchRepository searchRepository, PostRepository postRepository,CategoryRepository categoryRepository) {
+        this.searchRepository = searchRepository;
+        this.postRepository = postRepository;
+        this.categoryRepository = categoryRepository;
+    }
+    public List<Post> searchResult(String condition) {
+        List<Post> posts= searchRepository.search(condition);
+        for(Post post: posts) {
+            post.setImgUrl(postRepository.getImage(post.getId()));
+            post.setCategory(categoryRepository.getCategory(post.getId()));
+        }
+        return posts;
+    }
+
+}