Perhaps you should try some spelling variations:
china gene » china gender, china agenda
han china » hang china, than china, can china
wong sam » wong lai, kong sar, von sam
wong siu » wong shiu, kong siu, wong siew
wong sau » wong shiu, wong lai, kong sar
yan han » man han, yan zhang, kang han
yang yi » yang xi, yang jui
wang » wing, wan, lang

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 han china gene ((yang yi) OR (yang di)) ((wong sam) OR (((wong siu) OR (wong sau)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan han china gene ((yang yi) or (yang di)) ((wong sam) or (((wong siu) OR (wong sau)))) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan han china gene ((yang yi) or (yang di)) ((wong sam) or (((wong siu) OR (wong sau)))) ;*.