Perhaps you should try some spelling variations:
"child development century working papers" » "child development centre working papers", "child development centers working papers", "child development centered working papers", "child development century looking papers", "child development entry working papers", "child development century working paper"
"child development center working papers" » "child development centre working papers", "child development chapter working papers", "child development context working papers", "child development centred working papers", "child development inter working papers", "child development better working papers", "child development center working paper"

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: "((\"child development center working papers\") OR (\"child development century working papers\"))*".
• Removing quotes may allow a broader search: (( child development center working papers ) OR ( child development century working papers ))*.