Perhaps you should try some spelling variations:
yang yaong » wang yang, wang yong, yang yao
does human » des human, das human, does humanity
human gene » human genome, human gender, human bone
yang yang » wang yang, wang yan
gene yang » gene bank
yang jie » yang jin, yang di, yang jui
jie kang » jin kang, jie zhang, wie kann
kang ghi » hong ghi

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 yaong) OR (yang yang)) does human gene yang jie kang ghi ;~.
• Adding a wildcard symbol may retrieve word variants: ((yang yaong) or (yang yang)) does human gene yang jie kang ghi ;*.