Perhaps you should try some spelling variations:
gene yang » gene bank
shang hai » shang kai, dang hai, chang ha
yang jin » yang jie, yang jun, ying jin
hong hai » zhong tai, dang hai, hong tan
yang yi » yang di, yang xi, yang jui
yang ka » yang fan, yang yao
a gene » a genre, a gender, a gentle

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((yang yi) or (yang ka)) a gene yang jin ((hong hai) or (shang hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((yang yi) OR (yang ka)) a gene yang jin ((hong hai) OR (shang hai)) ;.
• Adding a wildcard symbol may retrieve word variants: dong ((yang yi) or (yang ka)) a gene yang jin ((hong hai) or (shang hai)) ;*.