Perhaps you should try some spelling variations:
long thanh » luong thanh, long han, long trinh
sang minh » kang minah, anh minh, song min
shang hai » shang kai, dang hai, chang ha
chai tan » chai tam, chai onn
tan sang » tan yang, tang tang, tan hong
ka chai » ka chuan, kim chai
yan ka » yang ka, yuan kai
wang » wing, wan, lang

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: wang yan ka chai tan sang minh ((shang hai) OR (long thanh)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yan ka chai tan sang minh ((shang hai) or (long thanh)) ;*.