Perhaps you should try some spelling variations:
"oecd development center working papers" » "oecd development centre working papers", "oecd development chapter working papers", "oecd development computer working papers", "child development center working papers", "based development center working papers", "oriented development center working papers", "oecd development centred working papers", "oecd development century working papers", "oecd development better working papers", "oecd development center working paper"
"oecd development career working papers" » "oecd development chapter working papers", "oecd development case working papers", "oecd development current working papers", "child development career working papers", "based development career working papers", "oriented development career working papers", "oecd development career working paper", "oecd development care working papers", "oecd development cancer working papers", "oecd development harder working papers"
"oecd development inter working papers" » "oecd development index working papers", "oecd development intra working papers", "oecd development inthe working papers", "child development inter working papers", "based development inter working papers", "oriented development inter working papers", "oecd development inter working paper", "oecd development inter networking papers", "oecd development internet working papers", "oecd development interface working papers"
"oecd development context working papers" » "child development context working papers", "based development context working papers", "oriented development context working papers", "oecd development content working papers", "oecd development context looking papers", "oecd development text working papers", "oecd development context working paper"

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