Perhaps you should try some spelling variations:
"international ecological economics theories" » "international technological economics theories", "international psychological economics theories", "international economics economics theories", "international ecological economic theories", "international ecological economics series", "international ecological economics theory"
"international policy economy series" » "international poverty economy series", "international prices economy series", "national policy economy series", "international policy economic series", "international polish economy series", "international politics economy series", "international policy 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 economics theories") OR ("international policy economy series"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"international ecological economics theories\") OR (\"international policy economy series\"))*".
• Removing quotes may allow a broader search: (( international ecological economics theories ) OR ( international policy economy series ))*.