Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
wang xiaoyi » wang xiaolin, wang xiaozu, wang xiaobing
zhang minh » zhang ming, zhang xin, sang minh
yang khan » yang dean, yang fan, yang ka
khan shen » han shen, khan sher, khan syed
chang min » zhang ming, chang mae, chan ming
cong zhi » zhong zhi, wang zhi, cong shu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang xiaoyi) or (wang xiaoping)) yang khan shen ((zhang minh) OR (chang min)) cong zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang xiaoyi) OR (wang xiaoping)) yang khan shen ((zhang minh) OR (chang min)) cong zhi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang xiaoyi) or (wang xiaoping)) yang khan shen ((zhang minh) OR (chang min)) cong zhi ;".
• Adding a wildcard symbol may retrieve word variants: ((wang xiaoyi) or (wang xiaoping)) yang khan shen ((zhang minh) OR (chang min)) cong zhi ;*.