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