Perhaps you should try some spelling variations:
"international africa's economic surveys" » "international prices economic surveys", "international agencies economic surveys", "international price economic surveys", "international africa economic surveys", "international african economic surveys", "international china's economic surveys", "international africa's economic survey"
"international policy economic services" » "international poverty economic services", "international prices economic services", "national policy economic services", "international policy ecological services", "international policy economic studies", "international policy economic survey"

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

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