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

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• Performing a fuzzy search may retrieve terms with similar spellings: (("international political economic series") OR ("International policy economic theories"))~.
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• Removing quotes may allow a broader search: (( international political economic series ) OR ( International policy economic theories )).
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