Perhaps you should try some spelling variations:
development development » development developing, development environment
regional economic » regional economics
special economic » social economic, spatial economics
legal economic » global economic, general economic
local economic » global economic, social 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 (((local economic) OR (special economic))))) OR (regional economic)) AND development development (leed) working papers.
• The words AND, OR and NOT may confuse the search; try adding quotes: "oecd ((((legal economic) or (((local economic) OR (special economic))))) or (regional economic)) and development development (leed) working papers".
• Adding a wildcard symbol may retrieve word variants: oecd ((((legal economic) or (((local economic) OR (special economic))))) or (regional economic)) and development development (leed) working papers*.