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

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