Perhaps you should try some spelling variations:
tran china » tuan china, than china, trade china
china sea » china asean
lang anh » dang anh, lang lang, lang und
anh tran » oanh tran, anh tuan, binh tran
yang jui » yang judy, yang yi
yang jun » pang jun, yang jin, yang judy
yang xi » yang yi

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: lang anh tran china sea ((((((yang jui) OR (yang xi))) OR (yang di))) OR (yang jun)) cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: lang anh tran china sea ((((((yang jui) or (yang xi))) or (yang di))) or (yang jun)) cong shu ;*.