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