Perhaps you should try some spelling variations:
wang yong » wang yang, wang hyoung, wang yan
liu zhang » li zhang, liu yang, bin zhang
zhang xin » zhang jian, zhang ming, zhang fan
wong sau » wong sam, wong siu, wong shiu
yang xi » yang yi, yang jui
von sam » von sap, von scham, von sach
von sa » von sap, von sl, von sach

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