Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
zhong tai » hong tan, zhong zhi
chai dan » chai onn, chai tam, shi dan
dan sang » dan yang, dan dana, dan qing
hong hai » shang hai, dang hai, hong tan
wai yan » wang yan, wei yang
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: wai yan ka chai dan sang minh ((hong hai) OR (zhong tai)) ;~.
• Adding a wildcard symbol may retrieve word variants: wai yan ka chai dan sang minh ((hong hai) or (zhong tai)) ;*.