Perhaps you should try some spelling variations:
"international psychological economics series" » "interaction psychological economics series", "international technological economics series", "intervention psychological economics series", "international psychological economic series", "international ecological economics series", "international psychological conflicts series"
"international political economic services" » "international policy economic services", "international political economy services", "international ecological economics services", "international political ecological services", "international political economic studies", "international political economic surveys"

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