Perhaps you should try some spelling variations:
"cooperation fast publiques periodiques." » "cooperation fast publique periodiques.", "cooperation fast appliquee periodiques.", "cooperation fast biologiques periodiques.", "cooperation _ publiques periodiques.", "cooperation sant publique periodiques."
"cooperation et ecologie periodiques." » "cooperation et biologie periodiques.", "cooperation et sociologie periodiques.", "cooperation et psychologie periodiques.", "cooperation _ ecologie periodiques.", "cooperation est ecologie periodiques.", "cooperation et economie periodiques."

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

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