Perhaps you should try some spelling variations:
"international ecological economics theories" » "international economics economics theories", "international economic economics theories", "international political economics theories", "international ecological economic theories", "international ecological economic theory", "international ecological economies theory"
"international policy economy series" » "international poverty economy series", "international prices economy series", "national policy economy series", "international policy economic series", "international policy autonomy series", "international poppy economy 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"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("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 ))*.