Perhaps you should try some spelling variations:
wuhan china » yunnan china
long thanh » luong thanh, long han, long trinh
tuan china » can china, taiwan china, yunnan china
ying jiao » ying jin, jing jia, ping jia
jin ying » li ying
tong hui » wang hui
gong hui » tong shui, wang hui, gong si

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 thanh ((wuhan china) OR (tuan china)) jin ying jiao ((tong hui) OR (gong hui)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "long thanh ((wuhan china) OR (tuan china)) jin ying jiao ((tong hui) or (gong hui)) ;~".
• Adding a wildcard symbol may retrieve word variants: long thanh ((wuhan china) OR (tuan china)) jin ying jiao ((tong hui) or (gong hui)) ;*.