Perhaps you should try some spelling variations:
"international ecological economic status" » "international technological economic status", "international psychological economic status", "international economics economic status", "international ecological economics status", "international political economic status", "international ecological economic sectors", "international ecological socioeconomic status"
"international prices economic theory" » "international crises economic theory", "international prices econometric theory", "international services economic 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 economic status") or ("international prices economic theory"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international ecological economic status") OR ("international prices economic theory")).
• Removing quotes may allow a broader search: (( international ecological economic status ) or ( international prices economic theory )).
• Adding a wildcard symbol may retrieve word variants: (("international ecological economic status") or ("international prices economic theory"))*.