Perhaps you should try some spelling variations:
thanh van » thanh dam, thanh vu
yang john » young john, king john, yang jin
song sam » kong sar, song pae, wong sau
wong sam » wong sau, wong lai, kong sar
tan hua » tuan hua, wang hua, tan chia
song so » song von
wang » wing, wan, lang

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

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