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