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 services", "international prices economic theories", "international prices economic surveys"
"international poppy economy series" » "international policy economy series", "international ports economy series", "international power economy series", "international open economy series"

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