Perhaps you should try some spelling variations:
duong van » cong van, duong anh
wing ian » wing tan, twinn ian, wing sun
cong ren » congo rep, congo red, cong sun
yan wang » yuan wang, yang yang, qian wang
wang tin » wang lin, wang qin, wang jing
gong min » jong min, song min, gong meng
cog min » jong min, song min

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wing ian ((cong ren) or (duong van)) yan wang tin ((gong min) or (cog min)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing ian ((cong ren) OR (duong van)) yan wang tin ((gong min) OR (cog min)) ;*.