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 survey" » "international driven autonomy survey", "international provider autonomy survey", "international private 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 survey"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international policy economy series") OR ("international prices autonomy survey")).
• Removing quotes may allow a broader search: (( international policy economy series ) or ( international prices autonomy survey )).
• Adding a wildcard symbol may retrieve word variants: (("international policy economy series") or ("international prices autonomy survey"))*.