Perhaps you should try some spelling variations:
"e nn decrease" » "e _ decrease" (Expand Search), "e n_ decrease" (Expand Search), "e n_ decreased" (Expand Search), "e n_ decreases" (Expand Search), "k nn decrease" (Expand Search), "_ nn decrease" (Expand Search)
"5 a decrease" » "5 _ decrease" (Expand Search), "5 _ decreased" (Expand Search), "5 _ decreases" (Expand Search)
"5 n decrease" » "5 _ decrease" (Expand Search), "5 _ decreased" (Expand Search), "5 _ decreases" (Expand Search), "15 n decrease" (Expand Search)
"e mean decrease" » "e mea_ decrease" (Expand Search), "e mea_ decreased" (Expand Search), "e mea_ decreases" (Expand Search), "_ mean decrease" (Expand Search), "a mean decrease" (Expand Search), "c mean decrease" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"5 a decrease\") OR (((\"5 n decrease\") OR (((\"e nn decrease\") OR (\"e mean decrease\"))))))~".
• Removing quotes may allow a broader search: (( 5 a decrease ) OR ((( 5 n decrease ) OR ((( e nn decrease ) OR ( e mean decrease ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("5 a decrease") OR ((("5 n decrease") OR ((("e nn decrease") OR ("e mean decrease"))))))*.