Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
gene yang » gene bank
yang min » yang mind, yang jin, tang min
min hong » amin hong, tin hong, min hyoung
hong hai » shang hai, zhong tai, dang hai
yang yi » yang di, yang xi, yang jui
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 yang)) a gene yang min hong hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((yang yi) OR (yang yang)) a gene yang min hong hai ;.
• Adding a wildcard symbol may retrieve word variants: dong ((yang yi) or (yang yang)) a gene yang min hong hai ;*.