Perhaps you should try some spelling variations:
"international policy economic surveys" » "international poverty economic surveys", "international prices economic surveys", "national policy economic surveys", "international policy economic studies", "international policy economic systems"
"international crisis economic services" » "international credit economic services", "international civil economic services", "international cases economic services", "international crisis economics series", "international crisis ecological services", "international crisis economic studies", "international crises econometric services", "international china's economic services"

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