Perhaps you should try some spelling variations:
yuan chang » yuan cheng, huang chang, han chang
yuan kang » yuan wang, chan kang, yuan kai
qian wang » yiqian wang, qian rong, qian yan
than done » than one, than money
gene one » gene clone, gene gene, none one
gene we » gene w, gene set
done a » done _, zone a, done 5

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: ((((yuan kang) OR (yuan chang))) OR (qian wang)) ling li ((gene one) OR (gene we)) than done a ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((yuan kang) or (yuan chang))) or (qian wang)) ling li ((gene one) OR (gene we)) than done a ;~".
• Adding a wildcard symbol may retrieve word variants: ((((yuan kang) or (yuan chang))) or (qian wang)) ling li ((gene one) OR (gene we)) than done a ;*.