Perhaps you should try some spelling variations:
"international political economy series" » "international policy economy series", "international political economics series"
"international prices economic series" » "international crises economic series", "international prices econometric series", "international services economic series", "international prices economics series", "international prices economic services", "international prices economic theories"

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