Perhaps you should try some spelling variations:
"oecd development cct working papers" » "child development cct working papers", "based development cct working papers", "oriented development cct working papers", "oecd development case working papers", "oecd development cct working paper", "oecd development act working papers", "oecd development net working papers", "oecd development hot working papers"
"oecd development cost working papers" » "child development cost working papers", "based development cost working papers", "oriented development cost working papers", "oecd development co working papers", "oecd development context working papers", "oecd development control working papers", "oecd development cost working paper", "oecd development hot working papers", "oecd development list working papers", "oecd development font working papers"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"oecd development cct working papers\") OR (\"oecd development cost working papers\"))".
• Removing quotes may allow a broader search: (( oecd development cct working papers ) OR ( oecd development cost working papers )).
• Adding a wildcard symbol may retrieve word variants: (("oecd development cct working papers") OR ("oecd development cost working papers"))*.