Perhaps you should try some spelling variations:
"oecd economies departments working paper" » "oecd economics department working paper", "oecd economies developments working paper", "oecd colleges departments working paper", "oecd economies department working paper", "oecd economies departments wrong paper", "oecd economies department boarding paper", "oecd economic departments working paper"
"world economics departments working papers" » "world economics department working papers", "world economics experiments working papers", "world economics payments working papers", "world economics departments wrong papers", "world economics department boarding papers", "world economy departments working papers", "food economics departments working papers", "grid economics departments working papers"
"world economic departments working papers" » "world economics department working papers", "world economic experiments working papers", "world academic departments working papers", "world economic department working papers", "world economic departments wrong papers", "world economic department boarding 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: (((("world economics departments working papers") OR ("world economic departments working papers"))) OR ("oecd economies departments working paper"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"world economics departments working papers\") OR (\"world economic departments working papers\"))) or (\"oecd economies departments working paper\"))*".
• Removing quotes may allow a broader search: (((( world economics departments working papers ) OR ( world economic departments working papers ))) or ( oecd economies departments working paper ))*.