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

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 system.") OR ("world economy and financial system."))))~.
• 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 economy and financial system.")))).
• 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 economy and financial system.\"))))".
• Removing quotes may allow a broader search: (( world economic and financial systems. ) or ((( world economic and financial system. ) OR ( world economy and financial system. )))).
• Adding a wildcard symbol may retrieve word variants: (("world economic and financial systems.") or ((("world economic and financial system.") OR ("world economy and financial system."))))*.