Perhaps you should try some spelling variations:
"international political economic surveys" » "international policy economic surveys", "international political economy surveys", "international ecological economics surveys", "international political economic studies", "international political economic systems"
"international poverty economy series" » "national poverty economy series", "international poverty economic series", "international poverty economies series", "international property economic series", "international poverty 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 poverty economy series") or ("international political economic surveys"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international poverty economy series") OR ("international political economic surveys")).
• Removing quotes may allow a broader search: (( international poverty economy series ) or ( international political economic surveys )).
• Adding a wildcard symbol may retrieve word variants: (("international poverty economy series") or ("international political economic surveys"))*.