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

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