Perhaps you should try some spelling variations:
"international poverty economic surveys" » "national poverty economic surveys", "international property economic surveys", "international forestry economic surveys", "international policy economic surveys", "international poverty economic studies", "international poverty economic systems"
"international rican economy series" » "international african economy series", "international rice economy series", "international american economy series", "international rican economics series", "international roman economy series", "international rich 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 poverty economic surveys") or ("international rican economy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international poverty economic surveys") OR ("international rican economy series")).
• Removing quotes may allow a broader search: (( international poverty economic surveys ) or ( international rican economy series )).
• Adding a wildcard symbol may retrieve word variants: (("international poverty economic surveys") or ("international rican economy series"))*.