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

Try widening your search to All Fields.

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

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