Perhaps you should try some spelling variations:
"international political economic theories" » "international policy economic theories", "international political economy theories", "international ecological economics theories", "international political economic theory", "international political economics series"
"international capital ecological services" » "international capital hydrological services", "international capital clinical services", "international capital meteorological services", "international capital psychological services", "international national ecological services", "international social ecological services"

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