Perhaps you should try some spelling variations:
yuhan cheng » yuan cheng, yunnan sheng
wang yuhan » wang luhang, wang yan, wang yidan
tan yong » tan hong, tan kong, tan yang
ran ying » fan ying, tan ying, jin ying
yang jie » yang jin, yang di, yang yi
yang jui » yang judy, yang di, yang yi
yang xi » yang di, yang yi
hai » hadi, haji, hari

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: ((tan yong) OR (ran ying)) wang yuhan cheng ((((yang jie) OR (yang jui))) OR (yang xi)) dang hai ;~.
• Adding a wildcard symbol may retrieve word variants: ((tan yong) or (ran ying)) wang yuhan cheng ((((yang jie) or (yang jui))) or (yang xi)) dang hai ;*.