Perhaps you should try some spelling variations:
zhang ming » zhang xin
wang yong » wang yang, wang hyoung, wang yan
liu zhang » li zhang, liu yang, bin zhang
yang jui » yang judy, yang di, yang yi
wong sam » wong sau, wong lai, kong sar
yang xi » yang di, yang yi
von sa » von sam, von sap, von sl

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 yong ((yang jui) OR (yang xi)) liu zhang ming ((wong sam) OR (von sa)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yong ((yang jui) or (yang xi)) liu zhang ming ((wong sam) or (von sa)) ;*.