Perhaps you should try some spelling variations:
wuhan china » tuan china, yunnan china
than china » tuan china, han china, can china
zhen chang » zhen zhang, shen chang, when change
wang wang » wang yang, wang liang, wang yan
chang min » zhang ming, chang mae, chan ming
min cong » minh cong, min hong, min jeong

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 wang ((wang hua) OR (((than china) OR (wuhan china)))) zhen chang min cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wang ((wang hua) or (((than china) OR (wuhan china)))) zhen chang min cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang wang ((wang hua) or (((than china) OR (wuhan china)))) zhen chang min cong shu ;*.