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