Perhaps you should try some spelling variations:
"collective extent report" » "collective expert report", "collective external report", "collective patient report", "collective parent report"
"subjective experience report" » "objective experience report"

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: (("subjective experience report") OR ("collective extent report")).
• Removing quotes may allow a broader search: (( subjective experience report ) or ( collective extent report )).
• Adding a wildcard symbol may retrieve word variants: (("subjective experience report") or ("collective extent report"))*.