Perhaps you should try some spelling variations:
human bone » human bones, human body
dong yang » dong hoang, wang yang, yang yang
dong ping » dong bin, dong jung, ting ping
hua gene » human gene, a gene, hua ren
jiu cong » li cong
yan jiu » yang jie, yang jin, pang jiu
cong du » long du, cong shu, cong sun
sin » sign, sind, skin

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) OR (((dong ping) OR (dong sin)))) ya ((hua gene) OR (human bone)) yan jiu cong du ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) or (((dong ping) OR (dong sin)))) ya ((hua gene) or (human bone)) yan jiu cong du ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (((dong ping) OR (dong sin)))) ya ((hua gene) or (human bone)) yan jiu cong du ;*.