Perhaps you should try some spelling variations:
"international politics economic theories" » "international relations economic theories", "international politics economics theories", "international politico economic theories", "international politics economy theories", "international politics economic theory", "international politics economics theory", "international politics economic ties"
"international political economics series" » "international political economits series", "international politics economics series", "international political economy series", "international political economys series"
"international political economies series" » "international political economy series", "international politics economics series", "international political ideologies series", "international political economies verghese", "international political economies crisis"
"international political economic series" » "international political economy series", "international political economic studies", "international political economic surveys"

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

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