Perhaps you should try some spelling variations:
development development » development developing
regional economic » regional economics
legal economic » local economic, global economic, special economic

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 (regional economic)) AND ((development development) OR (development environment)) (leed) ((working papers) OR (working paper)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "oecd ((legal economic) or (regional economic)) and ((development development) or (development environment)) (leed) ((working papers) OR (working paper))".
• Adding a wildcard symbol may retrieve word variants: oecd ((legal economic) or (regional economic)) and ((development development) or (development environment)) (leed) ((working papers) OR (working paper))*.