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

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