Perhaps you should try some spelling variations:
wuhan china » tuan china, yunnan china
cheng zhang » cheng han, zhen zhang, chen zheng
than china » tuan china, han china, can china
yang cheng » huang cheng, fang sheng, hong cheng
zhang hai » zhang dai, shang hai, zhang han
tan yang » dan yang, tan ying, tan yong

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 OR lang) yanling ((than china) OR (wuhan china)) tan yang cheng zhang hai ;~.
• Adding a wildcard symbol may retrieve word variants: (wan or lang) yanling ((than china) or (wuhan china)) tan yang cheng zhang hai ;*.