Perhaps you should try some spelling variations:
"collective expert report" » "collective effects report", "collective experience report", "collective expert reports", "collective export reports", "collective extent report"
"collective effect reports" » "collective effects reports", "convective effects reports", "collector effect reports", "collective defect reports", "collective effects report", "collective affect reported"

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