Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
dong ping » dong sin, dong bin, dong jung
gene yang » gene bank
hua gene » human gene, a gene, hua ren
yang jun » yang jui, pang jun, yang jin
jun ying » jin ying, fan ying, hui ying
ying hua » ming hua, wang hua, ying zhu

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: ((yang yang) OR (dong ping)) ya hua gene yang jun ying hua ;~.
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (dong ping)) ya hua gene yang jun ying hua ;*.