Perhaps you should try some spelling variations:
gene yang » gene bank
dong yang » dong hoang, wang yang, yang yang
zhong zhi » zhang zhi, hong ghi, zhong tai
yang min » yang mind, yang jin, tang min
yao a » rao a
bao a » bab a, bar a
zhong » zlong
hong » long
tan » than

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: dong yang ((yao a) OR (bao a)) gene yang min ((zhong zhi) OR (hong tan)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yang ((yao a) OR (bao a)) gene yang min ((zhong zhi) or (hong tan)) ;~".
• Adding a wildcard symbol may retrieve word variants: dong yang ((yao a) OR (bao a)) gene yang min ((zhong zhi) or (hong tan)) ;*.