Perhaps you should try some spelling variations:
yang david » wang david, young david, deng david
david west » david webster
west china » east china, what china, let china
china jin » china jing, china jiing, china joins
dong sein » dong bin, dong wei, ong sean
yang yao » yang yang, wang yan, yang yi
yao yang » yang yang

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: yang yao yang david west china jin ((dong sin) OR (dong sein)) ;~.
• Adding a wildcard symbol may retrieve word variants: yang yao yang david west china jin ((dong sin) or (dong sein)) ;*.