Perhaps you should try some spelling variations:
wuhan china » tuan china, yunnan china
zhang yan » zhang fan, zhang jian, wang yan
gain yang » dan yang, daun yang, tan yang
yao shang » gao shang, yao yang, hao zhang
shang hai » shang kai, dang hai, chang ha
lang yan » wang yan, wang yang, yang yang
yang yao » yang yang, wang yan, yang yi
tan hua » tuan hua, wang hua, tan chia

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) OR (zhang yan)) ((tan hua) OR (wuhan china)) gain yang yao shang hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang yan) OR (zhang yan)) ((tan hua) or (wuhan china)) gain yang yao shang hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((lang yan) OR (zhang yan)) ((tan hua) or (wuhan china)) gain yang yao shang hai ;*.