Perhaps you should try some spelling variations:
china gene » china gender, china agenda
kong sara » kong sar
wing yan » wang yan, wing ian, wing tan
yang jui » yang judy, yang xi, yang yi
wong sau » wong siu, wong shiu, wong lai
wong sam » wong lai, kong sar, von sam
yan can » yan clan, man can, yan cong

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