Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, wang xiaolin, huang xiaoting
yunnan china » urban china, tuan china, wuhan china
yeon chang » yeo chang, yuan chang, leone change
joon chang » hoong chang, boon chong, jin chang
china lee » china led, ching lee, china sleep
lee seung » lee seungho, lee sepang, lee kyung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang xiaoping) or (deng xiaoping)) yunnan china lee seung ((yeon chang) OR (joon chang)) hari ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang xiaoping) OR (deng xiaoping)) yunnan china lee seung ((yeon chang) OR (joon chang)) hari ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang xiaoping) or (deng xiaoping)) yunnan china lee seung ((yeon chang) OR (joon chang)) hari ;*".