Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
xiaoping wang » xiaoyang tang
change coping » change scoping, change mowing, change comparing
zhang zhi » zhong zhi, wang zhi, zhang wei
yan when » can when, win when
hong ng » hong kong, hong jong, hong hong

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 wang yan when change coping ((hong ng) or (zhang zhi)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang xiaoping wang yan when change coping ((hong ng) OR (zhang zhi)) ;.
• Adding a wildcard symbol may retrieve word variants: wang xiaoping wang yan when change coping ((hong ng) or (zhang zhi)) ;*.