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

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("international political economy studies") OR ("international political economic theories"))) OR ("international political economies series"))~.
• Removing quotes may allow a broader search: (((( international political economy studies ) or ( international political economic theories ))) or ( international political economies series ))~.
• Adding a wildcard symbol may retrieve word variants: (((("international political economy studies") or ("international political economic theories"))) or ("international political economies series"))*.