Perhaps you should try some spelling variations:
when changed » when change, been changed, we changed
changed john » change john, changed our, changed post
john cong » john song, john wong, john bonn
wang tao » wang qiao, huang tao, kang tae
yang jia » yang jie, yang jin, yang jing
jia when » jia shen, java when, a when

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: ((wang tao) OR (wang yan)) yang jia when changed john cong shu ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang tao) or (wang yan)) yang jia when changed john cong shu ;*.