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 yang » wang yan, wang liang, wang yanling
yang jie » yang jin, yang di, yang xi
yang jui » yang judy, yang di, yang xi
change c » change 1, change 2, change 10
yang yi » yang di, yang xi
ta chen » a chen, hua chen
let a » get a, let _, set a
a ta » a tax, a cta, a nta

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

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