Perhaps you should try some spelling variations:
"international policy economic series" » "international poverty economic series", "national policy economic series", "international aid economic series", "international policy economic services", "international policy economic theories", "international policy economic surveys"
"international prices economy series" » "international best economy series", "international banks economy series", "international rich economy series", "international rican economy series", "international africa's economy series"

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