Perhaps you should try some spelling variations:
"international property economic surveys" » "international prosperity economic surveys", "international poverty economic surveys", "international project economic surveys", "international property economic studies", "international property economic systems"
"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"

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