Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
gene yang » gene bank
yang amin » yang jin, yang lin, yang mind
amin hong » min hong, among hong, tin hong
hong hai » shang hai, zhong tai, dang hai
yet a » et a, yet _, get a
ya a » a a, y a, ye 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 yang ((ya a) or (yet a)) gene yang amin hong hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang ((ya a) OR (yet a)) gene yang amin hong hai ;.
• Adding a wildcard symbol may retrieve word variants: dong yang ((ya a) or (yet a)) gene yang amin hong hai ;*.