Perhaps you should try some spelling variations:
a changed » _ changed, a change, has changed
jie zhang » jia zhang, li zhang, bin zhang
zhang hai » zhang dai, shang hai, zhang han
erlang a » lang a
yang jie » yang jin, yang di, yang jui
i gene » _ gene, e gene, i gede
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: erlang a changed ((i gene) OR (a gene)) yang jie zhang hai ;~.
• Adding a wildcard symbol may retrieve word variants: erlang a changed ((i gene) or (a gene)) yang jie zhang hai ;*.