Perhaps you should try some spelling variations:
zhang jian » zhang fan, shang jin
dong skin » dong bin, dof skin
jian yang » qian yan, dan yang, jia fang
hua gene » human gene, hy5 gene
yang zhi » wang zhi, yan zhi, liang zhi
hua ren » hua chen
a gene » a genre, a gender, a gentle

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 sin) OR (dong skin)) ya ((((hua gene) OR (hua ren))) OR (a gene)) zhang jian yang zhi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong sin) or (dong skin)) ya ((((hua gene) OR (hua ren))) or (a gene)) zhang jian yang zhi ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong sin) or (dong skin)) ya ((((hua gene) OR (hua ren))) or (a gene)) zhang jian yang zhi ;*.