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