Perhaps you should try some spelling variations:
tuan china » wuhan china, can china, taiwan china
china dan » china den, china data, china des
zhong tai » hong tan, hong hai, zhong zhi
shang hai » shang kai, dang hai, chang ha
wang anh » dang anh, wang yang, wang yan
anh tuan » anh tran, dinh tuan, oanh tran
yang lin » wang lin, yang li, yang liang
yang jin » yang jie, yang jun, ying jin

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: wang anh tuan china dan ((yang lin) OR (yang jin)) ((zhong tai) OR (shang hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang anh tuan china dan ((yang lin) OR (yang jin)) ((zhong tai) or (shang hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang anh tuan china dan ((yang lin) OR (yang jin)) ((zhong tai) or (shang hai)) ;*.