Perhaps you should try some spelling variations:
human gene » human genome, human gender, human genetic
yang yaong » yang yang, wang yong, yang yao
human bone » human bones, human body
wang yang » wang yan, wang liang, wang yanling
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 (wang yang)) das ((human gene) OR (human bone)) yang jie kang ghi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yaong) or (wang yang)) das ((human gene) OR (human bone)) yang jie kang ghi ;~".
• Adding a wildcard symbol may retrieve word variants: ((yang yaong) or (wang yang)) das ((human gene) OR (human bone)) yang jie kang ghi ;*.