Perhaps you should try some spelling variations:
"international brief economic studies" » "international series economic studies", "international relief economic studies", "international border economic studies", "international brief economic status", "international tariff economic studies", "international britain economic studies", "international british economic studies"
"international brief socioeconomic status" » "international series socioeconomic status", "international relief socioeconomic status", "international border socioeconomic status", "international career socioeconomic status", "international guinea socioeconomic status", "international urban socioeconomic status", "international brief socioeconomic states"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("international brief economic studies") or ("international brief socioeconomic status"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international brief economic studies") OR ("international brief socioeconomic status")).
• Removing quotes may allow a broader search: (( international brief economic studies ) or ( international brief socioeconomic status )).
• Adding a wildcard symbol may retrieve word variants: (("international brief economic studies") or ("international brief socioeconomic status"))*.