Perhaps you should try some spelling variations:
oanh tran » anh tran, binh tran
yang john » young john, king john, yang jin
john wong » john song, john bonn
anh tuan » anh tran, dinh tuan
yu cheng » yu chen, _ cheng
jui chen » yi chen
wong sau » wong sam, wong siu, wong shiu

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((oanh tran) or (anh tuan)) ((yu cheng) or (jui chen)) yang john wong sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((oanh tran) OR (anh tuan)) ((yu cheng) OR (jui chen)) yang john wong sau ;.
• Adding a wildcard symbol may retrieve word variants: wang ((oanh tran) or (anh tuan)) ((yu cheng) or (jui chen)) yang john wong sau ;*.