Perhaps you should try some spelling variations:
chen yong » chen rong, chen yang, zhen yong
oanh tran » anh tran, binh tran
yong john » young john, kong john, wong john
john song » john wong, john bonn, john ngosong
anh tuan » anh tran, dinh tuan
hua chen » jui chen, yu chen, a chen
song sar » kong sar, using sar, song pae
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) ((anh tuan) or (oanh tran)) hua chen yong john song sar ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wan) ((anh tuan) OR (oanh tran)) hua chen yong john song sar ;.
• Adding a wildcard symbol may retrieve word variants: (wang or wan) ((anh tuan) or (oanh tran)) hua chen yong john song sar ;*.