Perhaps you should try some spelling variations:
"world economic and financial statements." » "world economic and financial management."
"world economy and financial crises." » "world economy and financial crisis."
"world economic and financial systems." » "world economic and financial sectors."
"world economic and financial system." » "world economic 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 economy and financial crises.") or ((((("world economic and financial systems.") or ("world economic and financial system."))) or ("world economic and financial statements."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("world economy and financial crises.") OR ((((("world economic and financial systems.") OR ("world economic and financial system."))) OR ("world economic and financial statements.")))).
• Removing quotes may allow a broader search: (( world economy and financial crises. ) or ((((( world economic and financial systems. ) or ( world economic and financial system. ))) or ( world economic and financial statements. )))).
• Adding a wildcard symbol may retrieve word variants: (("world economy and financial crises.") or ((((("world economic and financial systems.") or ("world economic and financial system."))) or ("world economic and financial statements."))))*.