Perhaps you should try some spelling variations:
"international policy economics series" » "international poverty economics series", "international prices economics series", "national policy economics series", "international policy economic series", "international politics economics series", "international politik economics series"
"international banks economics series" » "international bank economics series", "international best economics series", "international business economics series", "international bank economic series", "international bank's economic series", "international basket economics 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 policy economics series") OR ("international banks economics series"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"international policy economics series\") OR (\"international banks economics series\"))".
• Removing quotes may allow a broader search: (( international policy economics series ) OR ( international banks economics series )).
• Adding a wildcard symbol may retrieve word variants: (("international policy economics series") OR ("international banks economics series"))*.