Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yang jane » hwang jane, yang fan, yang jie
chen yong » chen rong, chen yang, chen ping
zhen yong » zheng rong, zheng cong, zheng song
john song » john wong, john bonn, john ngosong
wang » wan
shin » skin, sein, thin

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 OR wing) OR lang) yang yang jane ((chen yong) OR (zhen yong)) john song shin ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang or wing) or lang) yang yang jane ((chen yong) OR (zhen yong)) john song shin ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang or wing) or lang) yang yang jane ((chen yong) OR (zhen yong)) john song shin ;*.