Perhaps you should try some spelling variations:
wang congo » wang yong, wang hong
china rene » china ren, china rate, china real
congo can » congo call, cong van, congo a
yang jie » yang jin, yang yi, yang jun
yang jui » yang judy, yang yi
wong sau » wong sam, wong siu, wong shiu
yang xi » yang yi

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 congo can china rene ((((yang jie) OR (yang jui))) OR (((yang xi) OR (yang di)))) wong sau ;~.
• Adding a wildcard symbol may retrieve word variants: wang congo can china rene ((((yang jie) or (yang jui))) or (((yang xi) or (yang di)))) wong sau ;*.