Perhaps you should try some spelling variations:
wang oanh » wang yan, dang anh, wang ban
wang yang » wang yan, wang liang, wang yanling
yang john » young john, king john, yang jin
john wong » john song, john bonn
ren yang » ren yan, chen yang, dan yang
wong sam » wong sau, wong lai, kong sar
tan hua » tuan hua, wang hua, tan chia
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 (wang yang)) tan hua ren yang john wong sam ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang oanh) OR (wang yang)) tan hua ren yang john wong sam ;".
• Adding a wildcard symbol may retrieve word variants: ((wang oanh) OR (wang yang)) tan hua ren yang john wong sam ;*.