Perhaps you should try some spelling variations:
"international policy economy series" » "international poverty economy series", "international prices economy series", "national policy economy series", "international policy economic series", "international policy autonomy series", "international poppy economy series"
"international political economic theories" » "international political economy theories", "international policy economic theories", "international ecological economics theories", "international political economic theory"

Try widening your search to All Fields.

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 policy economy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economic theories") OR ("international policy economy series")).
• Removing quotes may allow a broader search: (( international political economic theories ) or ( international policy economy series )).
• Adding a wildcard symbol may retrieve word variants: (("international political economic theories") or ("international policy economy series"))*.