Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
shang hai » shang kai, chang ha, hong hai
wan yuan » yan yuan, wang yuhan, fang yuan
chai tan » chai tam, chai onn
tan sang » tan yang, tang tang, tan hong
yuan ka » yuan kai, yuan kang
ka chai » ka chuan, kim chai

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: wan yuan ka chai tan sang minh ((dang hai) OR (shang hai)) ;~.
• Adding a wildcard symbol may retrieve word variants: wan yuan ka chai tan sang minh ((dang hai) or (shang hai)) ;*.