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