Perhaps you should try some spelling variations:
wuhan china » yunnan china
tuan china » can china, taiwan china, yunnan china
han chang » huang chang, than change, can change
tan china » than china, can china, dan china
ren yang » ren yan, chen yang, dan yang
judy a » judy l, judy _, judy h
a yan » a yana, a man, a pan

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: han chang ((tan china) OR (((tuan china) OR (wuhan china)))) ren yang judy a yan ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "han chang ((tan china) or (((tuan china) OR (wuhan china)))) ren yang judy a yan ;~".
• Adding a wildcard symbol may retrieve word variants: han chang ((tan china) or (((tuan china) OR (wuhan china)))) ren yang judy a yan ;*.