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

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 political economic series") OR ("International political economics series"))))~.
• 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")))).
• 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\"))))".
• Removing quotes may allow a broader search: (( international political economy series ) or ((( International political economic series ) OR ( International political economics series )))).
• Adding a wildcard symbol may retrieve word variants: (("international political economy series") or ((("International political economic series") OR ("International political economics series"))))*.