Perhaps you should try some spelling variations:
"international poverty economics series" » "national poverty economics series", "international poverty economic series", "international poverty economies series", "international property economic series"
"international prices economic series" » "international crises economic series", "international prices econometric series", "international services economic series", "international prices economic services", "international prices economy series", "international prices economic theories"

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