Perhaps you should try some spelling variations:
human based » human caused, human cases, human case
based wang » based wage, based wind, based warning
yang yang » wang yang, wang yan
wang ying » wang yang, wang yong, wang jing
yang fan » zhang fan, yang dean, yang jin
ying jin » yang jin, jing ji, yang jie
4 human » 2 human, 3 human, 1 human
nr 4 » nr 1, nr 2

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((yang fan) or (yang yang))) or (yang di))nr 4 human human based wang ying jin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((yang fan) OR (yang yang))) OR (yang di))nr 4 human human based wang ying jin ;.
• Adding a wildcard symbol may retrieve word variants: ((((yang fan) or (yang yang))) or (yang di))nr 4 human human based wang ying jin ;*.