Perhaps you should try some spelling variations:
gene bank » gene banks, one bank, genomen bank
bank aid » band aid, bank card, bank adb
nan yan » nan ya, wang yan, qian yan
dong di » dong sin
can shu » can she, tan shu, cong shu
yet a » et a, yet _, get a
ye a » me a, y a, de a
e a » et a

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((nan yan) OR (dong di)) ((((ye a) OR (yet a))) OR (e a)) gene bank aid can shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((nan yan) OR (dong di)) ((((ye a) OR (yet a))) OR (e a)) gene bank aid can shu ;*.