Perhaps you should try some spelling variations:
"international poverty economic studies" » "national poverty economic studies", "international best economic studies", "international policy economic studies", "international energy economic studies", "international poverty economic status", "international poverty economic surveys"
"international prices economic services" » "international best economic services", "international banks economic services", "international prices ecological services", "international prices economic surveys", "international prices economic survey", "international crisis economic services", "international brief economic services", "international africa's economic 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 poverty economic studies") or ("international prices economic services"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international poverty economic studies") OR ("international prices economic services"))*.
• Removing quotes may allow a broader search: (( international poverty economic studies ) or ( international prices economic services ))*.