Perhaps you should try some spelling variations:
"oecd development control working papers" » "oecd development concept working papers", "oecd development concepts working papers", "oriented development control working papers", "oecd development content working papers", "oecd development control working paper"
"child development control working papers" » "child development concept working papers", "child development concepts working papers", "child development content working papers", "child development control working paper"
"based development control working papers" » "based development concept working papers", "based development concepts working papers", "based development content working papers", "based development control working paper"
"based development context working papers" » "based development content working papers", "based development context looking papers", "based development text working papers", "based development context working paper"

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