Perhaps you should try some spelling variations:
gene yang » gene bank
dong yang » dong hoang, wang yang, yang yang
yang jing » wang jing, yang jin, huang jing
shang hai » shang kai, dang hai, chang ha
hong hai » zhong tai, dang hai, hong tan
ya a » a a, y a, yu a
ye a » yet a, e a, me 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) or (wang yan)) ((ya a) or (ye a)) gene yang jing ((hong hai) OR (shang hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yang) OR (wang yan)) ((ya a) OR (ye a)) gene yang jing ((hong hai) OR (shang hai)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) or (wang yan)) ((ya a) or (ye a)) gene yang jing ((hong hai) OR (shang hai)) ;".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (wang yan)) ((ya a) or (ye a)) gene yang jing ((hong hai) OR (shang hai)) ;*.