Perhaps you should try some spelling variations:
"international political economic surveys" » "international policy economic surveys", "international ecological economics surveys", "international political economic studies", "international political economic systems"
"International political economy theories" » "International political economic theories", "International political economics theories", "International political economy 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 economy theories") or ("international political economic surveys"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("International political economy theories") OR ("international political economic surveys"))*.
• Removing quotes may allow a broader search: (( International political economy theories ) or ( international political economic surveys ))*.