Perhaps you should try some spelling variations:
"world economic and financial surveys." » "world economic and financial stress.", "world economic and financial services.", "world economic and financial studies.", "world economy and financial surveys."
"world economic and financial systems." » "world economic and financial system.", "world economic and financial statements.", "world economy and financial systems."
"world economic and financial service." » "world economic and financial services.", "world economy and financial service."
"world economic and financial burden." » "world economy and financial burden."

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: (((((("world economic and financial surveys.") OR ("world economic and financial burden."))) or ("world economic and financial systems."))) or ("world economic and financial service."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("world economic and financial surveys.") OR ("world economic and financial burden."))) OR ("world economic and financial systems."))) OR ("world economic and financial service.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"world economic and financial surveys.\") OR (\"world economic and financial burden.\"))) or (\"world economic and financial systems.\"))) or (\"world economic and financial service.\"))".
• Removing quotes may allow a broader search: (((((( world economic and financial surveys. ) OR ( world economic and financial burden. ))) or ( world economic and financial systems. ))) or ( world economic and financial service. )).
• Adding a wildcard symbol may retrieve word variants: (((((("world economic and financial surveys.") OR ("world economic and financial burden."))) or ("world economic and financial systems."))) or ("world economic and financial service."))*.