Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
wang hong » wang yong, wang hyoung, wang lihong
yang jie » yang jin, yang di, yang jui
wong sau » wong sam, wong siu, wong shiu
yang xi » yang di, yang jui
yang yi » yang di, yang jui
yan jiu » yang jin, pang jiu

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 yang) OR (wang hong)) ((yang xi) OR (yang yi)) test ((yan jiu) OR (yang jie)) wong sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (wang hong)) ((yang xi) OR (yang yi)) test ((yan jiu) or (yang jie)) wong sau ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (wang hong)) ((yang xi) OR (yang yi)) test ((yan jiu) or (yang jie)) wong sau ;*.