Perhaps you should try some spelling variations:
"international ecological economics surveys" » "international technological economics surveys", "international psychological economics surveys", "international economics economics surveys", "international ecological economic surveys", "international ecological economic survey", "international ecological economics series"
"international poverty economic series" » "national poverty economic series", "international property economic series", "international forestry economic series", "international policy economic series", "international poverty economics series", "international poverty economic services", "international poverty economy series"

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