Perhaps you should try some spelling variations:
"international political economic series" » "international policy economic series", "international political economy series", "international ecological economics series", "international political economic services", "international political economic theories"
international politics » international policy, international economics, international prices
"International politics economics series" » "International political economics series", "International political economies series", "International policy economic 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 economic series") or ("International politics economics series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economic series") OR ("International politics economics series")).
• Removing quotes may allow a broader search: (( international political economic series ) or ( International politics economics series )).
• Adding a wildcard symbol may retrieve word variants: (("international political economic series") or ("International politics economics series"))*.