Perhaps you should try some spelling variations:
shang kai » shang hai
sang yoo » sang yu
yoo yang » yao yang, yoo han, foo yong
yang hui » yang jui, wang hui, yang muxi
hui wang » hui yang, hui ping, hui tong
hong ghi » zhong zhi, hong g, hong hai
yan jun » yang jun, yan kun, san juan

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: sang yoo yang hui wang yan jun ((shang kai) OR (hong ghi)) ;~.
• Adding a wildcard symbol may retrieve word variants: sang yoo yang hui wang yan jun ((shang kai) or (hong ghi)) ;*.