Perhaps you should try some spelling variations:
"international economics econometric series" » "international countries econometric series", "international economics econometric society", "international economics economics series", "international economics econometric issues"
"international policy economic series" » "international poverty economic series", "international prices economic series", "national policy economic series", "international policy economics series", "international policy economic services", "international policy economy 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 economics econometric series") or ("international policy economic series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international economics econometric series") OR ("international policy economic series")).
• Removing quotes may allow a broader search: (( international economics econometric series ) or ( international policy economic series )).
• Adding a wildcard symbol may retrieve word variants: (("international economics econometric series") or ("international policy economic series"))*.