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

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

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