Perhaps you should try some spelling variations:
environment development » development development
employment development » employee development, development development, employment unemployment
regional economic » regional economics
global economic » global economy
paper » papers

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