Perhaps you should try some spelling variations:
zhang yan » zhang fan, zhang jian, wang yan
lang yan » wang yan, wang yang, yang yang
der rent » der re, der rede
song yun » song byung, chong yun, young yun
tian yi » qian yi, tian yu, tan yi
yi song » yi rong, li song, kim song
erence » terence, terrence

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((lang yan) OR (zhang yan)) guan ((der rent) OR (di erence)) tian yi song yun ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang yan) OR (zhang yan)) guan ((der rent) or (di erence)) tian yi song yun ;~".
• Adding a wildcard symbol may retrieve word variants: ((lang yan) OR (zhang yan)) guan ((der rent) or (di erence)) tian yi song yun ;*.