Perhaps you should try some spelling variations:
"international africa's economy series" » "international african economy series", "international prices economy series", "international airways economy series", "international africa's economic series", "international america's economic series", "international africa's economics series"
"international best economic surveys" » "international bank economic surveys", "international business economic surveys", "international best economic studies", "international best economic systems", "international west economic surveys", "international leste economic surveys", "international east economic surveys"

Try widening your search to All Fields.

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

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