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

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