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

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