Perhaps you should try some spelling variations:
"b largest decrease" » "b larger decrease" (Expand Search), "_ largest decrease" (Expand Search), "b large 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.

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