Perhaps you should try some spelling variations:
"a largest decrease" » "a larger decrease" (Expand Search), "a marked decrease" (Expand Search), "a large decrease" (Expand Search), "a latest decrease" (Expand Search)
"_ largest decrease" » "_ larger decrease" (Expand Search), "_ marked decrease" (Expand Search), "_ large decrease" (Expand Search)
"c large decrease" » "c larger decrease" (Expand Search), "c marked decrease" (Expand Search), "c large increases" (Expand Search), "_ large decrease" (Expand Search), "a large decrease" (Expand Search), "b large 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: "((((\"a largest decrease\") OR (\"_ largest decrease\"))) OR (\"c large decrease\"))~".
• Removing quotes may allow a broader search: (((( a largest decrease ) OR ( _ largest decrease ))) OR ( c large decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((("a largest decrease") OR ("_ largest decrease"))) OR ("c large decrease"))*.