Perhaps you should try some spelling variations:
thanh van » thanh dam, thanh vu
yang john » young john, king john, yang jin
tuan hua » tuan vu, yuan hui
song sam » kong sar, song pae, song so
wong sam » wong sau, wong lai, kong sar
wan yan » wang yan, nan yan, wai yan
tan hua » wang hua, tan chia, tan puay

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan ((thanh van) or (((tan hua) OR (tuan hua)))) irene yang john ((song sam) or (wong sam)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan ((thanh van) OR (((tan hua) OR (tuan hua)))) irene yang john ((song sam) OR (wong sam)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan ((thanh van) or (((tan hua) OR (tuan hua)))) irene yang john ((song sam) or (wong sam)) ;".
• Adding a wildcard symbol may retrieve word variants: wan yan ((thanh van) or (((tan hua) OR (tuan hua)))) irene yang john ((song sam) or (wong sam)) ;*.