Perhaps you should try some spelling variations:
yang zili » yang dali, yang li
zili gene » iii gene
gene bank » gene banks, one bank, genomen bank
yang yao » yang yang, wang yan, yang yi
yao yang » yang yang
jie song » jae song, jin song, li song
kim song » kim young, kim eung

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 yao yang zili gene bank ((jie song) OR (kim song)) ghi ;~.
• Adding a wildcard symbol may retrieve word variants: yang yao yang zili gene bank ((jie song) or (kim song)) ghi ;*.