Perhaps you should try some spelling variations:
"50 nn decrease" » "50 _ decrease" (Expand Search)
"50 we decrease" » "50 _ decrease" (Expand Search)
"5 c decrease" » "5 _ decrease" (Expand Search), "5 _ decreased" (Expand Search), "5 _ decreases" (Expand Search), "45 c decrease" (Expand Search)
"2 c decrease" » "2 _ decrease" (Expand Search), "2 _ decreased" (Expand Search), "2 _ decreases" (Expand Search), "12 c decrease" (Expand Search), "22 c 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 c decrease\") OR (\"2 c decrease\"))) OR (((\"50 nn decrease\") OR (\"50 we decrease\"))))~".
• Removing quotes may allow a broader search: (((( 5 c decrease ) OR ( 2 c decrease ))) OR ((( 50 nn decrease ) OR ( 50 we decrease ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("5 c decrease") OR ("2 c decrease"))) OR ((("50 nn decrease") OR ("50 we decrease"))))*.