Perhaps you should try some spelling variations:
john wong » john song, john bonn
tuan hua » tan hua, tuan vu, yuan hui
thanh vu » thanh van, thanh _
tan yang » dan yang, tan yong, tao yang
tan ying » fan ying, ran ying, tan yong
wong sam » wong sau, wong lai, kong sar
wang » wing, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wang or wan) dinh ((tuan hua) or (thanh vu)) ((tan yang) or (tan ying)) john wong sam ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wan) dinh ((tuan hua) OR (thanh vu)) ((tan yang) OR (tan ying)) john wong sam ;.
• Adding a wildcard symbol may retrieve word variants: (wang or wan) dinh ((tuan hua) or (thanh vu)) ((tan yang) or (tan ying)) john wong sam ;*.