Perhaps you should try some spelling variations:
economic departments » economics department, economic experiments, academic departments
departments working » department working, departments wrong, department boarding
working papers » working paper
oecd academic » lead academic, second academic, world academic
paper coating » powder coating, paper containing
oecd economic » world economic
paper coding » paper folding

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 academic ((paper coding) OR (paper coating)) papers ) OR ( oecd economic departments working papers )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( oecd academic ((paper coding) OR (paper coating)) papers ) or ( oecd economic departments working papers ))".
• Adding a wildcard symbol may retrieve word variants: (( oecd academic ((paper coding) OR (paper coating)) papers ) or ( oecd economic departments working papers ))*.