Perhaps you should try some spelling variations:
"c larger decrease" » "c marked decrease" (Expand Search), "_ larger decrease" (Expand Search), "c large decrease" (Expand Search), "_ large decrease" (Expand Search)
"ct values decrease" » "ct values increased" (Expand Search), "ct largest decrease" (Expand Search), "_ values decrease" (Expand Search), "i values 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)

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 larger decrease\") OR (\"ct values decrease\"))) OR (\"ic cases increased\"))~".
• Removing quotes may allow a broader search: (((( c larger decrease ) OR ( ct values decrease ))) OR ( ic cases increased ))~.
• Adding a wildcard symbol may retrieve word variants: (((("c larger decrease") OR ("ct values decrease"))) OR ("ic cases increased"))*.