Perhaps you should try some spelling variations:
employment development » development development, environment development, employment unemployment
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 ((employment development) OR (employee development)) (leed) working paper*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "oecd ((legal economic) OR (global economic)) and ((employment development) or (employee development)) (leed) working paper*".