Perhaps you should try some spelling variations:
wang oanh » wang yan, wang yang, wang ban
yang john » young john, king john, yang jin
john wong » john song, john bonn
dang anh » duong anh
tran hua » tan hua, tuan hua, tran duc
ren yang » ren yan, chen yang, dan yang
wong sam » wong sau, wong lai, kong sar
hua ren » hua chen

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) OR (dang anh)) tran hua ren yang john wong sam ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang oanh) OR (dang anh)) tran hua ren yang john wong sam ;".
• Adding a wildcard symbol may retrieve word variants: ((wang oanh) OR (dang anh)) tran hua ren yang john wong sam ;*.