Perhaps you should try some spelling variations:
"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 concept working papers", "oecd development cost working paper", "oecd development hot working papers", "oecd development list working papers", "oecd development font working papers"
"oecd development case working papers" » "child development case working papers", "based development case working papers", "oriented development case working papers", "oecd development chapter working papers", "oecd development case working paper", "oecd development care working papers", "oecd development base working papers", "oecd development clause working 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: (("oecd development cost working papers") OR ("oecd development case working papers")).
• Removing quotes may allow a broader search: (( oecd development cost working papers ) or ( oecd development case working papers )).
• Adding a wildcard symbol may retrieve word variants: (("oecd development cost working papers") or ("oecd development case working papers"))*.