Perhaps you should try some spelling variations:
ping duong » ping pong
zhang fang » zhang fan, zhang zhang, zhang yan
wang ning » wang jing, wang liang, wang yang
bin zhang » binh thang, li zhang, jia zhang
fang ping » zhang ping, dong ping, fan xing
duong van » cong van, duong anh
yang xi » yang di, yang jui
yang yi » yang di, 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: (wing OR lang) ((wang ning) OR (((yang xi) OR (yang yi)))) bin zhang fang ping duong van ;~.
• Adding a wildcard symbol may retrieve word variants: (wing or lang) ((wang ning) or (((yang xi) or (yang yi)))) bin zhang fang ping duong van ;*.