Perhaps you should try some spelling variations:
"a non decrease" » "a _ decrease" (Expand Search), "_ non decrease" (Expand Search)
"5 nn decrease" » "5 _ decrease" (Expand Search), "k nn decrease" (Expand Search), "_ nn decrease" (Expand Search)
"5 point decrease" » "_ point decrease" (Expand Search), "a point decrease" (Expand Search), "3d point decrease" (Expand Search)
"5 fold decrease" » "_ fold decrease" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("5 nn decrease") OR ((("5 fold decrease") OR ((("a non decrease") OR ("5 point decrease"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"5 nn decrease\") OR (((\"5 fold decrease\") OR (((\"a non decrease\") OR (\"5 point decrease\"))))))*".
• Removing quotes may allow a broader search: (( 5 nn decrease ) OR ((( 5 fold decrease ) OR ((( a non decrease ) OR ( 5 point decrease ))))))*.