Perhaps you should try some spelling variations:
yunnan china » urban china, tuan china, wuhan china
yan yunnan » yan yuan
yang yang » wang yang, wang yan
tan yang » dan yang, tan ying, tan yong
zong hai » dang hai, long han, zong he
hong hai » shang hai, zhong tai, dang hai
wang » wan, lang

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: (wang OR wing) yan yunnan china ((yang yang) OR (tan yang)) lin ((zong hai) OR (hong hai)) ;~.
• Adding a wildcard symbol may retrieve word variants: (wang or wing) yan yunnan china ((yang yang) or (tan yang)) lin ((zong hai) or (hong hai)) ;*.