Perhaps you should try some spelling variations:
"national politics economy series" » "national policies economy series", "national logistics economy series", "national policy economy series", "national political economy series", "national politics economics series", "national political economic 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: (("national politics economy series") or ("international prices autonomy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("national politics economy series") OR ("international prices autonomy series")).
• Removing quotes may allow a broader search: (( national politics economy series ) or ( international prices autonomy series )).
• Adding a wildcard symbol may retrieve word variants: (("national politics economy series") or ("international prices autonomy series"))*.