Perhaps you should try some spelling variations:
xiaodong huang » xiaotong zhang
xiaodong han » xiaotong zhang, xiaodong yu
minh dang » minh cong
mich dann » ich dann, mich das
china du » china due, china des, china den
du sang » du yang
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((xiaodong han) OR (xiaodong huang)) china du sang ((minh dang) or (mich dann)) hadi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((xiaodong han) OR (xiaodong huang)) china du sang ((minh dang) OR (mich dann)) hadi ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((xiaodong han) OR (xiaodong huang)) china du sang ((minh dang) or (mich dann)) hadi ;*".