Perhaps you should try some spelling variations:
"nature et society sector." » "nature et social sector.", "nature et society actors.", "nature et societe sector.", "nature e society sector.", "nature et societes sector.", "nature _ society sector."
"nature a society work." » "nature a society where.", "nature _ society work."
"nature et society ser." » "nature et societe ser.", "nature et society self.", "nature et society sri.", "nature e society ser.", "nature et societes ser.", "nature _ society ser."

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