Perhaps you should try some spelling variations:
yuhan cheng » yuan cheng, yunnan sheng
hang yuhan » wang yuhan, fang yuan
shang hai » shang kai, dang hai, chang ha
yin hang » yin fang, yin yang, ying chang
yang jie » yang jin, yang jui, yang jun
wan yin » fan ying, ran ying, tan ying
yang yi » yang jui
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: wan yin hang yuhan cheng ((((yang yi) OR (yang jie))) OR (((yang di) OR (yang xi)))) shang hai ;~.
• Adding a wildcard symbol may retrieve word variants: wan yin hang yuhan cheng ((((yang yi) or (yang jie))) or (((yang di) or (yang xi)))) shang hai ;*.