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 political economic theories" » "International political economy theories", "International policy economic theories", "International ecological economics theories", "International political economic theory", "International political 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 political economic theories") OR ("international political economic surveys"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"International political economic theories\") OR (\"international political economic surveys\"))".
• Removing quotes may allow a broader search: (( International political economic theories ) OR ( international political economic surveys )).
• Adding a wildcard symbol may retrieve word variants: (("International political economic theories") OR ("international political economic surveys"))*.