Perhaps you should try some spelling variations:
zhang jian » zhang fan, shang jin
ping wang » ping pong, hong wang
zhang min » zhang ming, zhang xin, chang min
zhi sign » i sign, ni sign
wong siu » wong shiu, kong siu, wong siew
wong sau » wong sam, wong shiu, wong lai
yan zhi » yan zi, wang zhi

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: ping wang yan zhi sign ((zhang min) OR (zhang jian)) ((wong siu) OR (wong sau)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ping wang yan zhi sign ((zhang min) or (zhang jian)) ((wong siu) OR (wong sau)) ;~".
• Adding a wildcard symbol may retrieve word variants: ping wang yan zhi sign ((zhang min) or (zhang jian)) ((wong siu) OR (wong sau)) ;*.