Perhaps you should try some spelling variations:
a changed » _ changed, a change, has changed
yang jing » wang jing, yang jin, huang jing
zhang hai » zhang dai, shang hai, zhang han
iea gene » e gene, i gene, iii gene
yang jia » yang jie, yang jin, yang di
lang a » lang 3, lang _, erlang a
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: lang a changed ((iea gene) OR (a gene)) ((yang jia) OR (yang jing)) zhang hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang a changed ((iea gene) or (a gene)) ((yang jia) OR (yang jing)) zhang hai ;~".
• Adding a wildcard symbol may retrieve word variants: lang a changed ((iea gene) or (a gene)) ((yang jia) OR (yang jing)) zhang hai ;*.