Perhaps you should try some spelling variations:
yuan cheng » yuan chang, huang cheng, yu cheng
wang yuan » wang yuhan, wang yan, fang yuan
dang hari » dang hai
tan yang » dan yang, tan ying, tan yong
ran ying » fan ying, tan ying, jin ying
yang jun » yang jui, pang jun, yang jin
yang yi » yang xi, yang jui

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 yang) OR (ran ying)) wang yuan cheng ((((yang yi) OR (yang jun))) OR (yang di)) dang hari ;~.
• Adding a wildcard symbol may retrieve word variants: ((tan yang) or (ran ying)) wang yuan cheng ((((yang yi) or (yang jun))) or (yang di)) dang hari ;*.