Perhaps you should try some spelling variations:
"oecd economics departments working papers" » "oecd economics department working papers", "oecd economics experiments working papers", "oecd economics payments working papers", "oecd economics departments wrong papers", "oecd economics department work papers", "oecd economic departments working papers", "oecd economies departments working papers", "kcd economics departments working papers", "oecd economics departments working paper"
"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 work papers", "world economic departments working paper"
"world academic department nursing papers" » "world academic departments nursing papers", "world academic patent nursing papers", "world academic development nursing papers", "world academic department guessing papers", "world academic departments using papers", "world academic department building papers", "world academic department using papers", "world academic department nursing fathers", "world academic department nursing experts"

Try widening your search to All Fields.

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 economics departments working papers") OR ((("world economic departments working papers") OR ("world academic department nursing papers")))).
• Removing quotes may allow a broader search: (( oecd economics departments working papers ) or ((( world economic departments working papers ) or ( world academic department nursing papers )))).
• Adding a wildcard symbol may retrieve word variants: (("oecd economics departments working papers") or ((("world economic departments working papers") or ("world academic department nursing papers"))))*.