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