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