Perhaps you should try some spelling variations:
"nature e social sector." » "nature e social sectors.", "nature _ social sector.", "nature a social sector.", "nature 3 social sector."
"nature et society ser." » "nature et society sector.", "nature et society work.", "nature e society ser.", "nature _ society ser.", "nature open society ser.", "nature _t society ser.", "nature at society ser."
"nature _t society ser." » "nature _t society sector.", "nature _t society work.", "nature _ society ser.", "nature e society ser.", "nature host society ser.", "nature a 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 _t society ser."))) or ("nature e social sector."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nature et society ser.") OR ("nature _t society ser."))) OR ("nature e social sector.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nature et society ser.\") OR (\"nature _t society ser.\"))) or (\"nature e social sector.\"))".
• Removing quotes may allow a broader search: (((( nature et society ser. ) OR ( nature _t society ser. ))) or ( nature e social sector. )).
• Adding a wildcard symbol may retrieve word variants: (((("nature et society ser.") OR ("nature _t society ser."))) or ("nature e social sector."))*.