Perhaps you should try some spelling variations:
international ecological » international technological, international psychological, international economics
"international political economy series" » "international policy economy series", "international political economics series"
"International ecological economics theories" » "International ecological economic theories", "International ecological economics series", "International ecological economics theory"

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 political economy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("International ecological economics theories") OR ("international political economy series"))*.
• Removing quotes may allow a broader search: (( International ecological economics theories ) or ( international political economy series ))*.