Perhaps you should try some spelling variations:
"world economy and financial service." » "world economy and financial services."
"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."

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