Perhaps you should try some spelling variations:
"ct values decrease" » "ct values increased" (Expand Search), "ct largest decrease" (Expand Search), "_ values decrease" (Expand Search), "i values decrease" (Expand Search)
"i larger decrease" » "i marked decrease" (Expand Search), "_ larger decrease" (Expand Search), "i large decrease" (Expand Search), "_ large decrease" (Expand Search)
"i cases increased" » "i rate increased" (Expand Search), "i levels increased" (Expand Search), "_ cases increased" (Expand Search), "3 cases increased" (Expand Search), "8 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: "((\"ct values decrease\") OR (((\"i larger decrease\") OR (\"i cases increased\"))))~".
• Removing quotes may allow a broader search: (( ct values decrease ) OR ((( i larger decrease ) OR ( i cases increased ))))~.
• Adding a wildcard symbol may retrieve word variants: (("ct values decrease") OR ((("i larger decrease") OR ("i cases increased"))))*.