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