Perhaps you should try some spelling variations:
"international polish economy series" » "international policy economy series", "international spanish economy series", "international ports economy series", "international polish economic series", "international politics economy series", "international polish economics series"
"international war economic series" » "international water economic series", "international waters economic series", "international women economic series", "international war economics series", "international war economic services", "international war economic theories"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("international polish economy series") OR ("international war economic series"))~.
• Removing quotes may allow a broader search: (( international polish economy series ) or ( international war economic series ))~.
• Adding a wildcard symbol may retrieve word variants: (("international polish economy series") or ("international war economic series"))*.