Perhaps you should try some spelling variations:
wang zeng » wang zheng, wang peng, tang zheng
zeng doug » jeng dong, zeng douglas
sang minh » kang minah, anh minh, song min
doug hua » dong hua
hua chen » jui chen, yu chen, a chen
wong siu » wong shiu, kong siu, wong sau
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.

• Performing a fuzzy search may retrieve terms with similar spellings: wang zeng doug hua chen ((sang minh) or (((yang judy) or (((yang xi) or (yang yi)))))) wong siu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang zeng doug hua chen ((sang minh) OR (((yang judy) OR (((yang xi) OR (yang yi)))))) wong siu ;.
• Adding a wildcard symbol may retrieve word variants: wang zeng doug hua chen ((sang minh) or (((yang judy) or (((yang xi) or (yang yi)))))) wong siu ;*.