Perhaps you should try some spelling variations:
tuan china » wuhan china, can china, taiwan china
china wen » chia wen, china won, ching wen
lang yan » wang yan, wang yang, zhang yan
yan tuan » yan guan, yan yuan, anh tuan
yang jie » yang jin, yang jui, yang yi
wong siu » wong shiu, kong siu, wong sau
yang xi » yang yi, yang jui

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 yan tuan china wen ((((yang xi) OR (yang di))) OR (yang jie)) wong siu ;~.
• Adding a wildcard symbol may retrieve word variants: lang yan tuan china wen ((((yang xi) or (yang di))) or (yang jie)) wong siu ;*.