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