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 sectors." » "world economic and financial sector.", "world economic and financial support.", "world economic and financial history."
"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 service.") OR ((("world economic and financial systems.") OR ("world economic and financial sectors."))))) OR ("world economic and financial system."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"world economy and financial service.\") OR (((\"world economic and financial systems.\") OR (\"world economic and financial sectors.\"))))) 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 sectors. ))))) 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 sectors."))))) OR ("world economic and financial system."))*.