Perhaps you should try some spelling variations:
development development » development developing, development environment
social economic » social economy, social ecological
legal economic » local economic, global economic, regional economic
working papers » working paper

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: oecd ((legal economic) OR (((social economic) OR (socio economic)))) AND ((development development) OR (environment development)) (leed) working papers.
• The words AND, OR and NOT may confuse the search; try adding quotes: "oecd ((legal economic) or (((social economic) OR (socio economic)))) and ((development development) or (environment development)) (leed) working papers".
• Adding a wildcard symbol may retrieve word variants: oecd ((legal economic) or (((social economic) OR (socio economic)))) and ((development development) or (environment development)) (leed) working papers*.