Perhaps you should try some spelling variations:
tuan china » wuhan china, can china, taiwan china
china chen » china shen, china china, china chang
lang anh » dang anh, lang lang, lang und
anh tuan » anh tran, dinh tuan, oanh tran
yang jui » yang judy, yang xi, yang yi
yang jie » yang jin, yang xi, yang yi
wong sam » wong sau, wong lai, kong sar

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 tuan china chen ((((yang jui) OR (yang di))) OR (yang jie)) wong sam ;~.
• Adding a wildcard symbol may retrieve word variants: lang anh tuan china chen ((((yang jui) or (yang di))) or (yang jie)) wong sam ;*.