Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
yang yang » wang yang, wang yan
cong van » congo can, duong van, cong sun
tang min » chang min, sang minh, yang mind
hong sin » dong sin, hong rina, hong song
dong di » dong sin
min tan » tin tan, wing tan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((cong van) OR (dong di)) ((yang yang) OR (wang yuhan)) tang min tan hong sin ;~.
• Adding a wildcard symbol may retrieve word variants: ((cong van) or (dong di)) ((yang yang) or (wang yuhan)) tang min tan hong sin ;*.