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

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 economic services") OR ("International policy economic services"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"International political economic services\") OR (\"International policy economic services\"))".
• Removing quotes may allow a broader search: (( International political economic services ) OR ( International policy economic services )).
• Adding a wildcard symbol may retrieve word variants: (("International political economic services") OR ("International policy economic services"))*.