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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"ct marked decrease\") OR (\"i largest decrease\"))) OR (\"ct values increased\"))~".
• Removing quotes may allow a broader search: (((( ct marked decrease ) OR ( i largest decrease ))) OR ( ct values increased ))~.
• Adding a wildcard symbol may retrieve word variants: (((("ct marked decrease") OR ("i largest decrease"))) OR ("ct values increased"))*.