Perhaps you should try some spelling variations:
"world economy and financial service." » "world economy and financial services.", "world economic and financial service."
"world economy and financial systems." » "world economy and financial system.", "world economy and financial statements.", "world economic and financial systems."
"world economy and financial series." » "world economy and financial services.", "world economy and financial studies.", "world economy and financial stress.", "world economic and financial series."

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