Perhaps you should try some spelling variations:
"international ecological economy studies" » "international technological economy studies", "international psychological economy studies", "international economics economy studies", "international ecological economic studies", "international biological economy studies", "international ecological economics studies", "international ecological economy series"
"international political economic theories" » "international policy economic theories", "international political economy 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 ecological economy studies") OR ("international political economic theories"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"international ecological economy studies\") OR (\"international political economic theories\"))".
• Removing quotes may allow a broader search: (( international ecological economy studies ) OR ( international political economic theories )).
• Adding a wildcard symbol may retrieve word variants: (("international ecological economy studies") OR ("international political economic theories"))*.