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

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