Perhaps you should try some spelling variations:
"international property economic series" » "international prosperity economic series", "international project economic series", "international ports economic series", "international property economics series", "international property economic services", "international property economy series"
"international poverty economic surveys" » "national poverty economic surveys", "international forestry economic surveys", "international policy economic surveys", "international energy economic surveys", "international poverty economic studies", "international poverty economic systems"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("international property economic series") or ("international poverty economic surveys"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international property economic series") OR ("international poverty economic surveys")).
• Removing quotes may allow a broader search: (( international property economic series ) or ( international poverty economic surveys )).
• Adding a wildcard symbol may retrieve word variants: (("international property economic series") or ("international poverty economic surveys"))*.