Perhaps you should try some spelling variations:
"nature e social sector." » "nature e social sectors.", "nature et social sector.", "nature de social sector.", "nature en social sector.", "nature e sociali sector.", "nature use social sector.", "nature age social sector."
"nature _ social sector." » "nature _ social sectors."
"nature e society work." » "nature e society where.", "nature free society work.", "nature et society work.", "nature de society work.", "nature en society work."

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