Perhaps you should try some spelling variations:
"international policy economy series" » "international poverty economy series", "national policy economy series", "international policy economic series", "international polish economy series", "international politics economy series", "international policy economics series"
"international prices autonomy series" » "international driven autonomy series", "international provider autonomy series", "international private autonomy series", "international prices astronomy series", "international prices autonomy states", "international prices autonomy 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 economy series") OR ("international prices autonomy series"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"international policy economy series\") OR (\"international prices autonomy series\"))".
• Removing quotes may allow a broader search: (( international policy economy series ) OR ( international prices autonomy series )).
• Adding a wildcard symbol may retrieve word variants: (("international policy economy series") OR ("international prices autonomy series"))*.