Perhaps you should try some spelling variations:
zhang yan » zhang fan, zhang jian, wang yan
yang john » young john, king john, yang jin
thanh vu » thanh van, thanh _
song sam » song pae, song so, wong sau
wong sam » wong sau, wong lai, von sam
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: zhang yan ((thanh vu) 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: zhang yan ((thanh vu) OR (tan hua)) irene yang john ((song sam) OR (((wong sam) OR (kong sar)))) ;.
• Adding a wildcard symbol may retrieve word variants: zhang yan ((thanh vu) or (tan hua)) irene yang john ((song sam) or (((wong sam) or (kong sar)))) ;*.