Perhaps you should try some spelling variations:
"World economic and financial strengthens." » "World economic and financial stresses.", "World economic and financial strengthenens."
"World economic and financial strengths." » "World economic and financial stress.", "World economic and financial stresses.", "World economic and financial strategies.", "World economic and financial strengthens."
"world economic and financial streams." » "world economic and financial stress.", "world economic and financial stresses.", "world economic and financial distress.", "world economy and financial streams."
"world economic and financial strength." » "world economy and financial strength.", "world economic and financial strengthen."

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 strengths.") OR ("World economic and financial strengthens."))) or ("world economic and financial streams."))) or ("world economic and financial strength."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("World economic and financial strengths.") OR ("World economic and financial strengthens."))) OR ("world economic and financial streams."))) OR ("world economic and financial strength."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"World economic and financial strengths.\") OR (\"World economic and financial strengthens.\"))) or (\"world economic and financial streams.\"))) or (\"world economic and financial strength.\"))*".
• Removing quotes may allow a broader search: (((((( World economic and financial strengths. ) OR ( World economic and financial strengthens. ))) or ( world economic and financial streams. ))) or ( world economic and financial strength. ))*.