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

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