Perhaps you should try some spelling variations:
china gene » china gender, china agenda
han china » hang china, than china, can china
wang man » wang yan, wang ban, wang dan
wong sau » wong siu, wong shiu, wong lai
wong sam » wong lai, kong sar, von sam
man han » man hat, man can, man kann
yang xi » yang yi, yang jui

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 man han china gene ((yang xi) OR (yang di)) ((wong sau) OR (wong sam)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang man han china gene ((yang xi) or (yang di)) ((wong sau) or (wong sam)) ;*.