Perhaps you should try some spelling variations:
"international politik economics series" » "internationale politik economics series", "internationalen politik economics series", "internationaler politik economics series", "international politics economics series", "international political economics series", "international positive economics series"
"international poverty economic series" » "national poverty economic series", "international property economic series", "international forestry economic series", "international policy economic series", "international poverty economic services", "international poverty economy series", "international poverty economic theories"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("international politik economics series") or ("international poverty economic series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international politik economics series") OR ("international poverty economic series"))*.
• Removing quotes may allow a broader search: (( international politik economics series ) or ( international poverty economic series ))*.