Perhaps you should try some spelling variations:
zhang ming » zhang xin
wang yong » wang yang, wang hyoung, wang yan
yong yang » yang yang, dong yang, ying yang
liu zhang » li zhang, liu yang, bin zhang
wong sam » wong sau, wong lai, kong sar
wong siu » wong shiu, kong siu, wong sau
yang xi » yang di, yang yi, yang jui
xi liu » x liu, xu liu
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 xi liu zhang ming ((((wong sam) OR (wong siu))) OR (von sa)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yong yang xi liu zhang ming ((((wong sam) or (wong siu))) or (von sa)) ;*.