Perhaps you should try some spelling variations:
tuan china » wuhan china, can china, taiwan china
china wen » chia wen, china won, ching wen
long anh » long thanh, duong anh, trong anh
anh tuan » anh tran, dinh tuan, oanh tran
yang jun » pang jun, yang judy, yang fan
yang jui » yang judy, yang di, yang xi
yang jin » yang jie, ying jin, shang jin
yang yi » yang di, yang xi

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: long anh tuan china wen ((((((yang jun) OR (yang yi))) OR (yang jui))) OR (yang jin)) cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: long anh tuan china wen ((((((yang jun) or (yang yi))) or (yang jui))) or (yang jin)) cong shu ;*.