add

search/utils/topic.py

@@ -293,7 +293,7 @@ class TopicUtils(object):
                 }
                 query_function_score["query"]["bool"]["should"] = [
                     {'multi_match': multi_match},
-                    {"terms":{"tag_list":tag_id}}
+                    {"term":{"tag_list":tag_id}}
 
                 ]
                 query_function_score["query"]["bool"]["minimum_should_match"] = 1