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

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