Perhaps you should try some spelling variations:
"nature et society sector." » "nature et society actors.", "nature et societe sector.", "nature et societes sector.", "nature ceo society sector.", "nature _ society sector.", "nature det society sector.", "nature ent society sector.", "nature ret society sector."
"nature e society sector." » "nature e society actors.", "nature free society sector.", "nature de society sector.", "nature en society sector.", "nature re society sector."
"nature et social sector." » "nature et social sectors.", "nature _ social sector.", "nature et sociales sector.", "nature 1 social sector.", "nature 11 social sector.", "nature det social sector.", "nature ent social sector.", "nature ret social sector."

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: (((("nature et society sector.") OR ("nature e society sector."))) or ("nature et social sector."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nature et society sector.") OR ("nature e society sector."))) OR ("nature et social sector.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nature et society sector.\") OR (\"nature e society sector.\"))) or (\"nature et social sector.\"))".
• Removing quotes may allow a broader search: (((( nature et society sector. ) OR ( nature e society sector. ))) or ( nature et social sector. )).
• Adding a wildcard symbol may retrieve word variants: (((("nature et society sector.") OR ("nature e society sector."))) or ("nature et social sector."))*.