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 autonomy series", "international poppy economy series", "international political economy series"
"international policy economic theories" » "international poverty economic theories", "international prices economic theories", "national policy economic theories", "international policy economic theory"

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