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

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("international political economy studies") or ("international political economic theories"))~.
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