diff --git a/scrapinglib/api.py b/scrapinglib/api.py
index dace413..0a9c7fe 100644
--- a/scrapinglib/api.py
+++ b/scrapinglib/api.py
@@ -179,15 +179,22 @@ class Scraping:
         if 'source' in json_data and json_data['source'] == 'javdb':
             # search other sources
             other_sources = sources[sources.index('javdb') + 1:]
-            # If cover not found in other source, then skip using other sources using javdb cover
-            try:
-                json_data_other = self.searchAdult(number, other_sources)
-                if json_data_other is not None:
-                    json_data['cover'] = json_data_other['cover']
-                    if self.debug:
-                        print(f"[+]Find movie [{number}] cover on website '{json_data_other['cover']}'")
-            except:
-                pass
+            while other_sources:
+            # If cover not found in other source, then skip using other sources using javdb cover instead
+                try:
+                    other_json_data = self.searchAdult(number, other_sources)
+                    if other_json_data is not None and 'cover' in other_json_data and other_json_data['cover'] != '':
+                        json_data['cover'] = other_json_data['cover']
+                        if self.debug:
+                            print(f"[+]Find movie [{number}] cover on website '{other_json_data['cover']}'")
+                        break
+                    # 当不知道source为何时，只能停止搜索
+                    if 'source' not in other_json_data:
+                        break
+                    # check other sources
+                    other_sources = sources[sources.index(other_json_data['source']) + 1:]
+                except:
+                    pass
             
         # Return if data not found in all sources
         if not json_data: