Perhaps you should try some spelling variations:
jin zhenong » jin zhesong
zhenong zhi » zhong zhi
gene yang » gene bank
hua gene » human gene, a gene, hua ren
yang jin » yang jie, yang jun, ying jin
yang yi » yang di, yang xi, yang jui
yang ka » yang fan, yang yao

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((yang yi) or (yang ka)) hua gene yang jin zhenong zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((yang yi) OR (yang ka)) hua gene yang jin zhenong zhi ;.
• Adding a wildcard symbol may retrieve word variants: dong ((yang yi) or (yang ka)) hua gene yang jin zhenong zhi ;*.