Perhaps you should try some spelling variations:
"international political economic theory" » "international policy economic theory", "international political economy theory", "international ecological economics theory"
"international politics economy series" » "international policy economy series", "international economics economy series", "international prices economy series", "international political economy series", "international politics economics series"

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 economic theory") or ("international politics economy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economic theory") OR ("international politics economy series"))*.
• Removing quotes may allow a broader search: (( international political economic theory ) or ( international politics economy series ))*.