Perhaps you should try some spelling variations:
"c largest decrease" » "c marked decrease" (Expand Search), "_ largest decrease" (Expand Search), "c large decrease" (Expand Search)
"c cases increased" » "c levels increased" (Expand Search), "c cycles increases" (Expand Search), "ic cases increased" (Expand Search), "c2 cases increased" (Expand Search), "_ cases increased" (Expand Search)
"c larger decrease" » "c marked decrease" (Expand Search), "_ larger decrease" (Expand Search), "c large decrease" (Expand Search), "_ large decrease" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("c cases increased") OR ((("c largest decrease") OR ("c larger decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"c cases increased\") OR (((\"c largest decrease\") OR (\"c larger decrease\"))))".
• Removing quotes may allow a broader search: (( c cases increased ) OR ((( c largest decrease ) OR ( c larger decrease )))).
• Adding a wildcard symbol may retrieve word variants: (("c cases increased") OR ((("c largest decrease") OR ("c larger decrease"))))*.