Perhaps you should try some spelling variations:
"international political economy series" » "international politics economy series"
"international political economic series" » "international politics economic series", "international political economies series", "international political economic theories", "international political economic studies"
"International political economics series" » "International political economies series", "International politics economics series", "International politico economic series"
"International political economits series" » "International political economies series", "International politics economics series", "International politico economic series", "International political concepts 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 series") OR ((("international political economic series") OR ((("International political economics series") OR ("International political economits series"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"international political economy series\") or (((\"international political economic series\") or (((\"International political economics series\") OR (\"International political economits series\"))))))~".
• Removing quotes may allow a broader search: (( international political economy series ) or ((( international political economic series ) or ((( International political economics series ) OR ( International political economits series ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("international political economy series") or ((("international political economic series") or ((("International political economics series") OR ("International political economits series"))))))*.