Perhaps you should try some spelling variations:
"international policy economic services" » "international poverty economic services", "international prices economic services", "national policy economic services", "international policy economics series", "international policy ecological services", "international policy economic studies"
"international political economy survey" » "international political economic survey", "international political economic surveys", "international political 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: (("international policy economic services") OR ("international political economy survey"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"international policy economic services\") OR (\"international political economy survey\"))".
• Removing quotes may allow a broader search: (( international policy economic services ) OR ( international political economy survey )).
• Adding a wildcard symbol may retrieve word variants: (("international policy economic services") OR ("international political economy survey"))*.