Perhaps you should try some spelling variations:
zhang yuan » zhang yan, zhang yuqin, zhang yifan
yuan wang » yan wang, yuan kang, yuan chang
wang guan » wang xuan, wang yuhan, yang guang
guan rene » juan rene, glas rene
yang jun » yang jui, pang jun, yang jin
wong sam » wong sau, wong lai, kong sar
yang yi » yang xi, yang jui

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: zhang yuan wang guan rene ((((((yang judy) OR (yang yi))) OR (yang jun))) OR (yang di)) wong sam ;~.
• Adding a wildcard symbol may retrieve word variants: zhang yuan wang guan rene ((((((yang judy) or (yang yi))) or (yang jun))) or (yang di)) wong sam ;*.