Perhaps you should try some spelling variations:
chai wang » chen wang
yang mind » yang cindy, yang jin, tang min
sang minh » kang minah, anh minh, song min
shang hai » shang kai, dang hai, chang ha
long tan » hong tan, long han, long thanh
ka chai » ka chuan, kim chai
yan ka » yang ka, yuan kai

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