Perhaps you should try some spelling variations:
changed john » change john, changed our, changed post
wang yang » wang yan, wang liang, wang yanling
yang zayn » yang fan
khan syed » ahsan syed, shah syed, khan sher
john hong » john song, john wong, john hope
can save » can have
hong yu » wong yue

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 yang zayn ((can save) OR (khan syed)) changed john hong yu ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang zayn ((can save) or (khan syed)) changed john hong yu ;*.