Perhaps you should try some spelling variations:
"world economic and financial systems." » "world economic and financial system.", "world economic and financial statements."
"world economic and financial stress." » "world economic and financial distress.", "world economic and financial access.", "world economic and financial strength."
"world economic and financial services." » "world economic and financial series."

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