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