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 polish economy series", "international politics economy series", "international policy economics series"
"national poverty autonomy series" » "national party autonomy series", "national policy autonomy series", "national overall autonomy series", "national poverty astronomy series", "national poverty autonomy states", "national poverty autonomy survey"

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