Perhaps you should try some spelling variations:
china gene » china gender, china agenda
wong shiu » wong siu, cong shu, song shin
wang dan » wang yan, wang ban, wang yidan
yang jui » yang judy, yang xi, yang yi
wong sau » wong siu, wong lai, kong sar
wong sam » wong lai, kong sar, von sam
dan can » dan cao, dan con, man can

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