Perhaps you should try some spelling variations:
yunnan china » urban china, tuan china, wuhan china
yang guang » yang yang, yang liang
wang yang » wang yan, wang liang, wang yanling
yan guan » gan guan, yan yuan, yihan guan
pei yang » wei yang, hui yang, pei yun
h yang » _ yang, hui yang
long d » long do, long du, long _

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 yang) OR (((yang guang) OR (yan guan)))) yunnan china ((pei yang) OR (h yang)) a long d ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (((yang guang) OR (yan guan)))) yunnan china ((pei yang) or (h yang)) a long d ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (((yang guang) OR (yan guan)))) yunnan china ((pei yang) or (h yang)) a long d ;*.