Perhaps you should try some spelling variations:
a changed » _ changed, a change, has changed
shang hai » shang kai, dang hai, chang ha
yang jin » yang jie, ying jin, shang jin
yang jun » yang jui, pang jun, yang judy
lang a » lang 3, lang _, erlang a
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: lang a changed ((i gene) OR (a gene)) ((yang jin) OR (yang jun)) shang hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang a changed ((i gene) or (a gene)) ((yang jin) OR (yang jun)) shang hai ;~".
• Adding a wildcard symbol may retrieve word variants: lang a changed ((i gene) or (a gene)) ((yang jin) OR (yang jun)) shang hai ;*.