Perhaps you should try some spelling variations:
china gain » china grain, china main, china going
main gene » brain gene, pain genes, main gate
gene bank » gene banks, one bank, genomen bank
did china » did china's
yang fan » zhang fan, yang dean, yang yang
bank did » bank aid, bank die, bank cdd
yang yi » yang jui
yang xi » yang jui
2 main » 1 main
nr 2 » nr 1

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 yi) OR (yang xi))) OR (yang fan))) OR (yang di))nr 2 main gene bank did china gain ;~.
• Adding a wildcard symbol may retrieve word variants: ((((((yang yi) or (yang xi))) or (yang fan))) or (yang di))nr 2 main gene bank did china gain ;*.