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

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