Perhaps you should try some spelling variations:
using change » using exchange, putting change, sensing change
yulan using » plan using
chen yulan » chen yugang, chen yulu, chen yun
wang liang » wang yang
change 10 » change 1, change 11, change 10.4
yang jie » yang jin, yang di, yang xi
yang jui » yang judy, yang di, yang xi
yang yi » yang di, yang xi
a chen » ta chen, _ chen, n chen
let a » get a, let _, set a
a a » a la

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((wang liang) or (yang jie))) or (((yang jui) or (yang yi))))let a a chen yulan using change 10 ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((wang liang) OR (yang jie))) OR (((yang jui) OR (yang yi))))let a a chen yulan using change 10 ;.
• Adding a wildcard symbol may retrieve word variants: ((((wang liang) or (yang jie))) or (((yang jui) or (yang yi))))let a a chen yulan using change 10 ;*.