Perhaps you should try some spelling variations:
"collection functions et societe." » "production functions et societe.", "collective actions et societe.", "collection functions _ societe.", "collection function _ societe.", "collection functions et society.", "collection functions et societies.", "collection functions et societal."
"collection action et societes." » "collective action et societes.", "collective actions et societes.", "collection method et societes.", "collection action _ societes.", "collection action a societes.", "collection action et societys.", "collection action et societiess.", "collection action et societals."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("collection action et societes.") or ("collection functions et societe."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("collection action et societes.") OR ("collection functions et societe.")).
• Removing quotes may allow a broader search: (( collection action et societes. ) or ( collection functions et societe. )).
• Adding a wildcard symbol may retrieve word variants: (("collection action et societes.") or ("collection functions et societe."))*.