Perhaps you should try some spelling variations:
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
long tan » hong tan, long han, long thanh
ka chai » ka chuan, kim chai
yan ka » yang ka, yuan kai
wang » wing, wan

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 OR lang) yan ka chai tan sang minh ((shang hai) OR (long tan)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang OR lang) yan ka chai tan sang minh ((shang hai) or (long tan)) ;~".
• Adding a wildcard symbol may retrieve word variants: (wang OR lang) yan ka chai tan sang minh ((shang hai) or (long tan)) ;*.