Perhaps you should try some spelling variations:
wang danning » wang yanling, wang yangming, wang ning
wang daoping » wang xiaoping, wang xiaobing, wang yanling
human gene » human genome, human gender, human bone
gene sang » lee sang, gene bank
sang minh » kang minah, anh minh, song min
minh dang » minh cong, mich dann

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang danning) OR (wang daoping)) a human gene sang minh dang (hai OR haji) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang danning) OR (wang daoping)) a human gene sang minh dang (hai or haji) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang danning) OR (wang daoping)) a human gene sang minh dang (hai or haji) ;*.