Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
gene bank » gene banks, one bank, genomen bank
dong bin » dong sin, dong di, dann bin
dan cao » dan cao's, dong cao
li cong » li song, jiu cong
li rong » yi rong, li song, shi rong
a gene » a genre, a gender, a gentle
ye a » yet a, e a, me a

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((dong bin) or (dan cao))) or (yang yang)) ye a gene bank ((li cong) or (li rong)) shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((dong bin) OR (dan cao))) OR (yang yang)) ye a gene bank ((li cong) OR (li rong)) shu ;.
• Adding a wildcard symbol may retrieve word variants: ((((dong bin) or (dan cao))) or (yang yang)) ye a gene bank ((li cong) or (li rong)) shu ;*.