Perhaps you should try some spelling variations:
wuhan china » tuan china, yunnan china
yan wuhan » yan guan, yan yuan
china wen » chia wen, china won, ching wen
yang jin » yang jie, yang jun, shang jin
ying jin » jing ji, yang jie
wai yan » wang yan, wei yang
yan jiu » yang jie, pang jiu

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: wai yan wuhan china wen ((yan jiu) OR (((yang jin) OR (ying jin)))) cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: wai yan wuhan china wen ((yan jiu) or (((yang jin) or (ying jin)))) cong shu ;*.