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 studies."
"world economy and financial stress." » "world economy and financial distress.", "world economy and financial access.", "world economy and financial studies."

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