Perhaps you should try some spelling variations:
yunnan sheng » yunnan china
yuhan cheng » yuan cheng
wang liang » wang yang
liang wang » liang dan, liang tan, liang ying
guan kong » tan kong, nan kong, yuan kang
zhang zhi » zhong zhi, wang zhi, zhang wei
hang zhi » wang zhi, liang zhi, zhong zhi

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 liang wang ((yuhan cheng) OR (yunnan sheng)) guan kong ((hang zhi) OR (zhang zhi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang wang ((yuhan cheng) OR (yunnan sheng)) guan kong ((hang zhi) or (zhang zhi)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang liang wang ((yuhan cheng) OR (yunnan sheng)) guan kong ((hang zhi) or (zhang zhi)) ;*.