Perhaps you should try some spelling variations:
"international politics economy series" » "international political economy series", "international economics economy series", "international prices economy series", "international politics economics series", "international political economic series"
"international policy economic theories" » "international poverty economic theories", "international prices economic theories", "national policy economic theories", "international policy economic theory", "international policy 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 policy economic theories") or ("international politics economy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international policy economic theories") OR ("international politics economy series"))*.
• Removing quotes may allow a broader search: (( international policy economic theories ) or ( international politics economy series ))*.