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)
"ic cases increased" » "ic rate increased" (Expand Search), "ic levels increased" (Expand Search), "19 cases increased" (Expand Search), "_ cases increased" (Expand Search), "3 cases increased" (Expand Search)
"c marked decrease" » "c marked increase" (Expand Search), "_ marked decrease" (Expand Search), "a marked decrease" (Expand Search), "n marked 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: (("ic cases increased") OR ((("c largest decrease") OR ("c marked decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"ic cases increased\") OR (((\"c largest decrease\") OR (\"c marked decrease\"))))*".
• Removing quotes may allow a broader search: (( ic cases increased ) OR ((( c largest decrease ) OR ( c marked decrease ))))*.