Perhaps you should try some spelling variations:
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"oecd economic department working papers" » "oecd economic debasement working papers", "oecd academic department working papers", "oecd economic experiment working papers", "oecd economic departments working papers", "oecd economic department boarding papers", "oecd economic department work papers", "oecd economic department working paper"
"world economic department working papers" » "world economic debasement working papers", "world academic department working papers", "world economic experiment working papers", "world economic departments working papers", "world economic department boarding papers", "world economic department work papers", "world economic department working paper"
"world economic department nursing papers" » "world economic debasement nursing papers", "world academic department nursing papers", "world economic experiment nursing papers", "world economic department guessing papers", "world economic departments using papers", "world economic department building papers", "world economic department using papers", "world economic department nursing fathers", "world economic 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 economic department working papers") OR ((("world economic department working papers") OR ("world economic department nursing papers"))))) OR ("oecd economics department working papers")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"oecd economic department working papers\") or (((\"world economic department working papers\") OR (\"world economic department nursing papers\"))))) or (\"oecd economics department working papers\"))".
• Removing quotes may allow a broader search: (((( oecd economic department working papers ) or ((( world economic department working papers ) OR ( world economic department nursing papers ))))) or ( oecd economics department working papers )).
• Adding a wildcard symbol may retrieve word variants: (((("oecd economic department working papers") or ((("world economic department working papers") OR ("world economic department nursing papers"))))) or ("oecd economics department working papers"))*.