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 self autonomy series" » "international sale autonomy series", "international silk autonomy series", "international sales autonomy series", "international self astronomy series", "international self autonomy states", "international self autonomy survey", "international user autonomy series"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("international self autonomy series") OR ("international africa's economy series"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"international self autonomy series\") OR (\"international africa's economy series\"))".
• Removing quotes may allow a broader search: (( international self autonomy series ) OR ( international africa's economy series )).
• Adding a wildcard symbol may retrieve word variants: (("international self autonomy series") OR ("international africa's economy series"))*.