Perhaps you should try some spelling variations:
"world economy and financial surveys." » "world economy and financial systems.", "world economy and financial service.", "world economy and financial burden."
"world economic and financial series." » "world economic and financial service.", "world economic and financial studies.", "world economic and financial systems."
"world economic and financial stress." » "world economic and financial distress.", "world economic and financial access.", "world economic and financial strength."

You may be able to get more results by adjusting your search query.

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