Perhaps you should try some spelling variations:
"world economic and financial surveys." » "world economic and financial systems.", "world economic and financial service.", "world economic and financial studies."
"world economy and financial stress." » "world economy and financial distress.", "world economy and financial access.", "world economy and financial strength."
"world economy and financial series." » "world economy and financial service.", "world economy and financial studies.", "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 burden."))) or ("world economy and financial stress."))) or ((("world economy and financial services.") OR ("world economy and financial series."))))~.
• 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 economy and financial stress."))) OR ((("world economy and financial services.") OR ("world economy and financial series."))))*.
• 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 economy and financial stress.\"))) or (((\"world economy and financial services.\") OR (\"world economy and financial series.\"))))*".
• Removing quotes may allow a broader search: (((((( world economic and financial surveys. ) or ( world economic and financial burden. ))) or ( world economy and financial stress. ))) or ((( world economy and financial services. ) OR ( world economy and financial series. ))))*.