Perhaps you should try some spelling variations:
china gender » china under, child gender, chiefs gender
tuan china » wuhan china, can china, taiwan china
wing yan » wang yan, wing ian, wing tan
yan tuan » yan guan, yan yuan, anh tuan
yang jui » yang judy, yang xi, yang yi
wong sam » wong sau, kong sar, von sam
lai » laid

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: wing yan tuan china gender ((yang jui) OR (yang di)) ((wong sam) OR (wong lai)) ;~.
• Adding a wildcard symbol may retrieve word variants: wing yan tuan china gender ((yang jui) or (yang di)) ((wong sam) or (wong lai)) ;*.