Perhaps you should try some spelling variations:
"international prices economic series" » "international best economic series", "international banks economic series", "international crisis economic series", "international brief economic series", "international africa's economic series", "international prices economic theories", "international prices economic surveys", "international prices economic studies"
"international policy economic services" » "international poverty economic services", "national policy economic services", "international aid economic services", "international policy ecological services", "international policy economic surveys", "international policy economic studies"

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