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