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)
"ad cases increased" » "ad rate increased" (Expand Search), "ad levels increased" (Expand Search), "all cases increased" (Expand Search), "19 cases increased" (Expand Search), "_ cases increased" (Expand Search)
"i large decrease" » "i marked decrease" (Expand Search), "i large increases" (Expand Search), "i large degree" (Expand Search), "_ large decrease" (Expand Search), "a large decrease" (Expand Search), "via 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: (("ct values decrease") OR ((("i large decrease") OR ("ad cases increased"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"ct values decrease\") OR (((\"i large decrease\") OR (\"ad cases increased\"))))".
• Removing quotes may allow a broader search: (( ct values decrease ) OR ((( i large decrease ) OR ( ad cases increased )))).
• Adding a wildcard symbol may retrieve word variants: (("ct values decrease") OR ((("i large decrease") OR ("ad cases increased"))))*.