Perhaps you should try some spelling variations:
"cor values decrease" » "cor values increased" (Expand Search), "cor largest decrease" (Expand Search), "cr values decrease" (Expand Search), "score values decrease" (Expand Search), "color values decrease" (Expand Search)
"19 cases increased" » "19 rate increased" (Expand Search), "19 levels increased" (Expand Search)
"i larger decrease" » "i marked decrease" (Expand Search), "_ larger decrease" (Expand Search), "i large decrease" (Expand Search), "_ large 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: "((((\"cor values decrease\") OR (\"19 cases increased\"))) OR (\"i larger decrease\"))~".
• Removing quotes may allow a broader search: (((( cor values decrease ) OR ( 19 cases increased ))) OR ( i larger decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((("cor values decrease") OR ("19 cases increased"))) OR ("i larger decrease"))*.