Perhaps you should try some spelling variations:
collective patient » collecting patient, collection patient, collective patterns
"collective expert report" » "collective effects report", "collective experience report", "collective expert reports", "collective export reports", "collective extent report"
"Collective patient report" » "Collective patients report", "Collective patient reported", "Collective patient record"

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