Perhaps you should try some spelling variations:
"international political economy series" » "international policy economy series", "international political economics series"
"international crises economic services" » "international crisis economic services", "international crimes economic services", "international cases economic services", "international crises economics series", "international crises ecological services", "international crises economic studies", "international crime economic services", "international prices economic services"

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 economy series") or ("international crises economic services"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economy series") OR ("international crises economic services"))*.
• Removing quotes may allow a broader search: (( international political economy series ) or ( international crises economic services ))*.