Perhaps you should try some spelling variations:
"international political economic series" » "international policy economic series", "international political economy series", "international ecological economics series", "international political economics series", "international political economic services"
"international economic economics surveys" » "international economics economics surveys", "international economics economic surveys", "international economy economics surveys", "international economic economic surveys", "international economic economic survey", "international economic economics series"

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