Perhaps you should try some spelling variations:
cong china » kong china, ming china, qing china
china gene » china gender, china agenda
yang jui » yang judy, yang xi, yang yi
wong siu » wong shiu, kong siu, wong siew
wong sau » wong sam, wong shiu, wong lai
wang » wing, wan, lang
yan » ryan
yang » ryang

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 yan cong china gene ((yang jui) OR (yang di)) ((wong siu) OR (wong sau)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yan cong china gene ((yang jui) or (yang di)) ((wong siu) or (wong sau)) ;*.