Perhaps you should try some spelling variations:
does human » das human, does humanity, models human
yang yang » wang yang, wang yan
des human » das human, des humains, des humanen
gene yang » gene bank
jin kyung » jin ying, han kyung, jin kang
yang yao » wang yan, yang yi, yang fan
yang jin » yang jie, yang jun, ying jin
ghi » nghi, ghia

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: ((yang yao) OR (yang yang)) ((does human) OR (des human)) gene yang jin kyung ghi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yao) or (yang yang)) ((does human) OR (des human)) gene yang jin kyung ghi ;~".
• Adding a wildcard symbol may retrieve word variants: ((yang yao) or (yang yang)) ((does human) OR (des human)) gene yang jin kyung ghi ;*.