Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
wong shiu » wong siu, cong shu, song shin
ren sang » lee sang, le sang, ren weng
wong sam » wong sau, wong lai, kong sar
yan y.c » yang y.c
yang yi » yang di, yang xi, yang jui
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: lang ((yan y.c) OR (yang yi)) hua ren sang minh ((wong sam) OR (wong shiu)) ;~.
• Adding a wildcard symbol may retrieve word variants: lang ((yan y.c) or (yang yi)) hua ren sang minh ((wong sam) or (wong shiu)) ;*.