Perhaps you should try some spelling variations:
"international political economics studies" » "international policy economics studies", "international political economic studies", "international political economy studies", "international ecological economics studies", "international political economics series", "international political economics study"
"international political economies series" » "international policy economies series", "international political economic series", "international political economy series", "international ecological economics series", "international political economics series"

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 political economics studies") or ("international political economies series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economics studies") OR ("international political economies series")).
• Removing quotes may allow a broader search: (( international political economics studies ) or ( international political economies series )).
• Adding a wildcard symbol may retrieve word variants: (("international political economics studies") or ("international political economies series"))*.