Perhaps you should try some spelling variations:
"based development cost working papers" » "based development co working papers", "based development context working papers", "based development concept working papers", "based development list working papers", "based development font working papers", "based development ist working papers"
"based development cost working paper" » "based development co working paper", "based development context working paper", "based development concept working paper", "based development list working paper", "based development font working paper", "based development ist working paper"
"oecd development hot working papers" » "child development hot working papers", "oriented development hot working papers", "oecd development host working papers", "oecd development how working papers", "oecd development http working papers", "oecd development net working papers", "oecd development set working papers", "oecd development joint working papers"

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