Perhaps you should try some spelling variations:
gene yang » gene bank
yan yuan » yan guan, fang yuan, yan clan
yang jie » yang jin, yang di, yang jui
jie song » jae song, jin song, kim song
yan yan » yang yang, wang yan, qian yan
nan yan » nan ya, wang yan, qian yan
a gene » a genre, a gender, a gentle
wang » wing, wan, lang

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: wang ((((yan yan) OR (nan yan))) OR (yan yuan)) a gene yang jie song (sar OR star) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((((yan yan) OR (nan yan))) or (yan yuan)) a gene yang jie song (sar or star) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((((yan yan) OR (nan yan))) or (yan yuan)) a gene yang jie song (sar or star) ;*.