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 services." » "world economy and financial series."
"world economic and financial strength." » "world economic and financial strengths.", "world economic and financial strengthen."

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