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