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