Perhaps you should try some spelling variations:
"international political economy series" » "international policy economy series", "international political economics series"
"international poverty economic services" » "national poverty economic services", "international poverty economics series", "international poverty ecological services", "international poverty economic studies", "international property economic services", "international forestry economic services", "international policy economic services"

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