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

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