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