Perhaps you should try some spelling variations:
yuan cheng » yuan chang, huang cheng, yu cheng
yang yuan » fang yuan, yan yuan, yang yun
dang hadi » dang hai
ran ying » jin ying, gao ying, ka ying
fan ying » fan xing, jin ying, fa yin
tan ying » tan yang, tan yong, tan hong
yang xi » yang yi, 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: ((((ran ying) OR (fan ying))) OR (tan ying)) yang yuan cheng ((yang di) OR (yang xi)) dang hadi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((ran ying) OR (fan ying))) or (tan ying)) yang yuan cheng ((yang di) or (yang xi)) dang hadi ;~".
• Adding a wildcard symbol may retrieve word variants: ((((ran ying) OR (fan ying))) or (tan ying)) yang yuan cheng ((yang di) or (yang xi)) dang hadi ;*.