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