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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan can china gene ((yang yi) or (yang di)) ((wong sam) or (((wong siu) OR (wong sau)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan can china gene ((yang yi) OR (yang di)) ((wong sam) OR (((wong siu) OR (wong sau)))) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan can china gene ((yang yi) or (yang di)) ((wong sam) or (((wong siu) OR (wong sau)))) ;*".