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

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("International political economic series") OR ("International political economic services"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"International political economic series\") OR (\"International political economic services\"))".
• Removing quotes may allow a broader search: (( International political economic series ) OR ( International political economic services )).
• Adding a wildcard symbol may retrieve word variants: (("International political economic series") OR ("International political economic services"))*.