Perhaps you should try some spelling variations:
"oecd economics department working papers" » "oecd economics development working papers", "oecd economics experiments working papers", "oecd economics management working papers", "oecd economics departments working papers", "oecd economics department boarding papers", "oecd economics department nursing papers", "oecd economies department working papers", "world economics department working papers", "sound economics department working papers"
"kcd economics department working papers" » "kcd economics development working papers", "kcd economics experiments working papers", "kcd economics management working papers", "kcd economics departments working papers", "kcd economics department boarding papers", "kcd economics department nursing papers", "oecd economies department working papers", "land economics department working papers", "food economics department working papers"
"oecd economic debasement working paper" » "oecd economic measurement working paper", "oecd economic appeasement working paper", "oecd economic management working paper", "oecd economic statement working paper", "oecd economic deployment working paper"
"oecd academic department working papers" » "oecd academic departments working papers", "oecd academic patent working papers", "oecd academic development working papers", "oecd academic department boarding papers", "oecd academic department nursing papers", "lead academic department working papers", "second academic department working papers", "world academic department working papers"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("oecd economic debasement working paper") OR ("oecd academic department working papers"))) OR ((("oecd economics department working papers") OR ("kcd economics department working papers")))).
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