Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
shang hai » shang kai, dang hai, chang ha
dan sang » dan yang, dan dana, dan qing
chai dan » chai onn, chai tam, shi dan
hong hai » zhong tai, dang hai, hong tan
wan yan » nan yan, wai yan, wang yang
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 yan) OR (wang yan)) ka chai dan sang minh ((hong hai) OR (shang hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan yan) OR (wang yan)) ka chai dan sang minh ((hong hai) or (shang hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wan yan) OR (wang yan)) ka chai dan sang minh ((hong hai) or (shang hai)) ;*.