Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
shang hai » shang kai, chang ha, hong hai
kai chai » ka chai, goi chai, kim chai
chai tan » chai tam, chai onn
tan sang » tan yang, tang tang, tan hong
wan tan » tan tan, wing tan
tan kai » tan kah, 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: wan tan kai chai tan sang minh ((dang hai) OR (shang hai)) ;~.
• Adding a wildcard symbol may retrieve word variants: wan tan kai chai tan sang minh ((dang hai) or (shang hai)) ;*.