Perhaps you should try some spelling variations:
cong china » kong china, ming china, qing china
china gene » china gender, china agenda
wong siew » long view
yang jui » yang judy, yang xi, yang yi
wong sau » wong sam, wong shiu, wong lai
wong siu » wong shiu, kong siu, dong sin
wang » wing, wan, lang
yan » ryan
yang » ryang

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