diff --git a/api/db/services/document_service.py b/api/db/services/document_service.py
index eca6877a9f..70e7af77c5 100644
--- a/api/db/services/document_service.py
+++ b/api/db/services/document_service.py
@@ -16,6 +16,7 @@
 import random
 from datetime import datetime
 from elasticsearch_dsl import Q
+from peewee import fn
 
 from api.settings import stat_logger
 from api.utils import current_timestamp, get_format_time
@@ -40,8 +41,9 @@ def get_by_kb_id(cls, kb_id, page_number, items_per_page,
                      orderby, desc, keywords):
         if keywords:
             docs = cls.model.select().where(
-                cls.model.kb_id == kb_id,
-                cls.model.name.like(f"%%{keywords}%%"))
+                (cls.model.kb_id == kb_id),
+                (fn.LOWER(cls.model.name).contains(keywords.lower()))
+             )
         else:
             docs = cls.model.select().where(cls.model.kb_id == kb_id)
         count = docs.count()