Perhaps you should try some spelling variations:
yuan wang » yan wang, yuan kang, yuan chang
yan yang » yang yang, dan yang, tan yang
yao yang » yang yang
yang jun » yang jui, pang jun, yang judy
yang jin » yang jie, ying jin, shang jin
chang ha » chang mae
hong hai » shang hai, zhong tai, dang hai

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: wang ((yan yang) OR (yao yang)) yuan wang ((yang jun) OR (yang jin)) ((chang ha) OR (hong hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yang) or (yao yang)) yuan wang ((yang jun) OR (yang jin)) ((chang ha) or (hong hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yang) or (yao yang)) yuan wang ((yang jun) OR (yang jin)) ((chang ha) or (hong hai)) ;*.