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

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

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