Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
xiaoping than » xiaoping how, xiaoping shi
sang minh » kang minah, anh minh, song min
dang hadi » dang hai
china du » china due, china den, china 1
yang jin » yang jie, yang jun, ying jin

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 than ((china du) OR (china des)) ((sang minh) or (yang jin)) dang hadi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang xiaoping than ((china du) OR (china des)) ((sang minh) OR (yang jin)) dang hadi ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang xiaoping than ((china du) OR (china des)) ((sang minh) or (yang jin)) dang hadi ;*".