Perhaps you should try some spelling variations:
tuan china » wuhan china, can china, taiwan china
than china » han china, wuhan china, can china
gain yang » dan yang, daun yang, tan yang
bin zhang » binh thang, li zhang, jia zhang
zhang hai » zhang dai, shang hai, zhang han
wing tan » wing ian, liang tan, hong tan
yang bin » yang jin, yang lin, huang bin

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: wing tan ((wang hua) OR (((than china) OR (tuan china)))) gain yang bin zhang hai ;~.
• Adding a wildcard symbol may retrieve word variants: wing tan ((wang hua) or (((than china) or (tuan china)))) gain yang bin zhang hai ;*.