Perhaps you should try some spelling variations:
john wong » john song, john bonn
wang yang » wang yan, wang liang, wang yanling
wang anh » dang anh, wang yan, wang all
yan john » ryan john, gain john, tian john
wong sam » wong sau, wong lai, kong sar
tan hua » tuan hua, wang hua, tan chia
hua ren » hua chen

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 anh) OR (wang yang)) tan hua ren yan john wong sam ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang anh) or (wang yang)) tan hua ren yan john wong sam ;*.