Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
gene yang » gene bank
dong nan » dong sin, dong bin
dong cao » dong xiao, dan cao, yong cai
yang li » yang lin, yang di, yang xi
li cong » li rong, li song, jiu cong
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 nan) OR (dong yang))) or (dong cao))) or (yang yang)) ye a gene yang li cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((((dong nan) OR (dong yang))) OR (dong cao))) OR (yang yang)) ye a gene yang li cong shu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((dong nan) OR (dong yang))) or (dong cao))) or (yang yang)) ye a gene yang li cong shu ;".
• Adding a wildcard symbol may retrieve word variants: ((((((dong nan) OR (dong yang))) or (dong cao))) or (yang yang)) ye a gene yang li cong shu ;*.