Perhaps you should try some spelling variations:
changed john » changed our, changed post, changed rome
change john » chasse john, change japan, channon john
yang java » yang maha
java when » data when
lang yan » wang yan, wang yang, zhang yan
yan yang » yang yang, yao yang, dan yang
wong siu » wong shiu, kong siu, wong sau

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yan yang java when ((change john) OR (changed john)) wong siu ;~".
• Adding a wildcard symbol may retrieve word variants: lang yan yang java when ((change john) OR (changed john)) wong siu ;*.