Perhaps you should try some spelling variations:
yuan kang » yuan wang, yuan chang, chan kang
shang hai » shang kai, dang hai, chang ha
hua rene » hua ren, juan rene
hong hai » zhong tai, dang hai, hong tan
yang ka » yang fan, yang yao
yan tin » yuan ting, yang jin, yang lin
yan 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: wan ((yan ka) OR (yang ka)) hua rene ((yan tin) OR (yuan kang)) ((hong hai) OR (shang hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((yan ka) or (yang ka)) hua rene ((yan tin) or (yuan kang)) ((hong hai) OR (shang hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: wan ((yan ka) or (yang ka)) hua rene ((yan tin) or (yuan kang)) ((hong hai) OR (shang hai)) ;*.