Perhaps you should try some spelling variations:
development development » development developing, development environment
global economic » global economy, regional economic
legal economic » local economic, regional economic, special 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 (global 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 (global economic)) and ((development development) or (environment development)) (leed) working papers".
• Adding a wildcard symbol may retrieve word variants: oecd ((legal economic) OR (global economic)) and ((development development) or (environment development)) (leed) working papers*.