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

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