Perhaps you should try some spelling variations:
international policy » international poverty, international prices, national policy
"International policy economic services" » "International policy economics series", "International policy ecological services", "International policy economic studies"
"international political economy series" » "international political economics series"

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

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