Perhaps you should try some spelling variations:
china gender » china under, child gender, chiefs gender
tuan china » wuhan china, can china, taiwan china
wang yang » wang yan, wang liang, wang yanling
yang tuan » yang guang, yang dean, yang fan
yang jui » yang judy, yang xi, yang yi
wong sau » wong sam, wong siu, wong shiu

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 tuan china gender ((yang jui) OR (yang di)) ((von scham) OR (wong sau)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang tuan china gender ((yang jui) or (yang di)) ((von scham) or (wong sau)) ;*.