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