Perhaps you should try some spelling variations:
"world economic and financial sectors." » "world economic and financial sector.", "world economic and financial systems.", "world economic and financial history."
"world economic and financial support." » "world economic and financial sector."
"world economic and financial system." » "world economic and financial sector."
"world economy and financial series." » "world economy and financial services.", "world economy and financial service.", "world economy and financial studies."

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