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 studies." » "world economic and financial services."
"world economy and financial system." » "world economy and financial sector."
"world economic and financial access." » "world economic and financial assets.", "world economic and financial crisis.", "world economic and financial crises."

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