Perhaps you should try some spelling variations:
"world economic and financial systems." » "world economic and financial system.", "world economic and financial statements.", "world economy and financial systems."
"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 economic and financial strength." » "world economy and financial strength.", "world economic and financial strengths.", "world economic and financial strengthen."

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 stress.") or ("world economic and financial systems."))) or ("world economic and financial strength."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("world economic and financial stress.") OR ("world economic and financial systems."))) OR ("world economic and financial strength.")).
• Removing quotes may allow a broader search: (((( world economic and financial stress. ) or ( world economic and financial systems. ))) or ( world economic and financial strength. )).
• Adding a wildcard symbol may retrieve word variants: (((("world economic and financial stress.") or ("world economic and financial systems."))) or ("world economic and financial strength."))*.