Perhaps you should try some spelling variations:
"nature et societes ser." » "nature et societe ser.", "nature et societes de.", "nature et societes et.", "nature des societes ser.", "nature et sociales ser."
"nature et societes en." » "nature et societe en.", "nature des societes en.", "nature et sociales en.", "nature et societes et.", "nature et societes de."
"nature _ social work." » "nature _ social workers."

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 societes ser.") OR ("nature et societes en."))) or ("nature _ social work."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nature et societes ser.") OR ("nature et societes en."))) OR ("nature _ social work."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nature et societes ser.\") OR (\"nature et societes en.\"))) or (\"nature _ social work.\"))*".
• Removing quotes may allow a broader search: (((( nature et societes ser. ) OR ( nature et societes en. ))) or ( nature _ social work. ))*.