Perhaps you should try some spelling variations:
"world economic and financial service." » "world economic and financial services."
"world economic and financial stress." » "world economic and financial access.", "world economic and financial strength.", "world economic and financial systems."
"world economic and financial series." » "world economic and financial services.", "world economic and financial studies.", "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 service.") or ((("world economic and financial stress.") or ("world economy and financial distress."))))) or ((("world economic and financial series.") or ("world economic and financial barriers."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("world economic and financial service.") OR ((("world economic and financial stress.") OR ("world economy and financial distress."))))) OR ((("world economic and financial series.") OR ("world economic and financial barriers.")))).
• Removing quotes may allow a broader search: (((( world economic and financial service. ) or ((( world economic and financial stress. ) or ( world economy and financial distress. ))))) or ((( world economic and financial series. ) or ( world economic and financial barriers. )))).
• Adding a wildcard symbol may retrieve word variants: (((("world economic and financial service.") or ((("world economic and financial stress.") or ("world economy and financial distress."))))) or ((("world economic and financial series.") or ("world economic and financial barriers."))))*.