Perhaps you should try some spelling variations:
environment development » development development
employment development » development development, employment unemployment, component development
legal economic » local economic, global economic, regional economic
oecd legal » oecd local

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 AND ((((employment development) OR (environment development))) OR (employee development)) (leed) working (paper OR papers).
• The words AND, OR and NOT may confuse the search; try adding quotes: "oecd legal economic and ((((employment development) OR (environment development))) or (employee development)) (leed) working (paper or papers)".
• Adding a wildcard symbol may retrieve word variants: oecd legal economic and ((((employment development) OR (environment development))) or (employee development)) (leed) working (paper or papers)*.