Perhaps you should try some spelling variations:
international policy » international poverty, international prices, national policy
"international political economic services" » "international political economy services", "international ecological economics services", "international political ecological services", "international political economic surveys", "international political economic studies"
"International policy economic series" » "International policy economic theories", "International policy economic surveys", "International policy economic studies"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("International policy economic series") or ("international political economic services"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("International policy economic series") OR ("international political economic services")).
• Removing quotes may allow a broader search: (( International policy economic series ) or ( international political economic services )).
• Adding a wildcard symbol may retrieve word variants: (("International policy economic series") or ("international political economic services"))*.