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

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