Perhaps you should try some spelling variations:
von sprachen » von sprache, von sprach, und sprachen
wang liang » wang yang
liang ying » liang liying, huang ying, zhang ying
kong sara » kong sar
yang jui » yang judy, yang xi, yang yi
ying yu » ming yu, ping yu, ying zhu
yu chen » yu cheng, yi chen, yulu chen

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: wang liang ying yu chen ((yang jui) OR (yang di)) ((von sprachen) OR (kong sara)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang liang ying yu chen ((yang jui) or (yang di)) ((von sprachen) or (kong sara)) ;*.