Perhaps you should try some spelling variations:
"nature e society sector." » "nature e social sector.", "nature e society actors.", "nature _ society sector.", "nature a society sector."
"nature et society ser." » "nature et society work.", "nature _ society ser.", "nature host society ser.", "nature does society ser.", "nature _t society ser.", "nature at society ser."
"nature open society ser." » "nature open society work.", "natural open 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 open society ser."))) or ("nature e society sector."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nature et society ser.") OR ("nature open society ser."))) OR ("nature e society sector.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nature et society ser.\") OR (\"nature open society ser.\"))) or (\"nature e society sector.\"))".
• Removing quotes may allow a broader search: (((( nature et society ser. ) OR ( nature open society ser. ))) or ( nature e society sector. )).
• Adding a wildcard symbol may retrieve word variants: (((("nature et society ser.") OR ("nature open society ser."))) or ("nature e society sector."))*.