Perhaps you should try some spelling variations:
"c marked decrease" » "c marked increase" (Expand Search), "_ marked decrease" (Expand Search), "a marked decrease" (Expand Search), "_ market decrease" (Expand Search)
"n marked decrease" » "n marked increase" (Expand Search), "_ marked decrease" (Expand Search), "a marked decrease" (Expand Search), "_ market 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("c large decrease") OR ((("c marked decrease") OR ("n marked decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"c large decrease\") OR (((\"c marked decrease\") OR (\"n marked decrease\"))))*".
• Removing quotes may allow a broader search: (( c large decrease ) OR ((( c marked decrease ) OR ( n marked decrease ))))*.