Perhaps you should try some spelling variations:
does human » des human, does humanity, models human
yang yang » wang yang, wang yan
das human » des human, sdgs human, vs human
gene yang » gene bank
han kyung » han kyul, han heung, jin kyung
yang yao » wang yan, yang yi, yang fan
yang han » yang fan, kang han, yang dean

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