Perhaps you should try some spelling variations:
"auc values decrease" » "auc values increased" (Expand Search), "auc largest decrease" (Expand Search)
"_ days increased" » "_ dalys increased" (Expand Search), "_ mass increased" (Expand Search), "_ cases increased" (Expand Search), "7 days increased" (Expand Search), "_ day increased" (Expand Search), "5 days 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)

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: "((((\"auc values decrease\") OR (\"_ days increased\"))) OR (\"i large decrease\"))~".
• Removing quotes may allow a broader search: (((( auc values decrease ) OR ( _ days increased ))) OR ( i large decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((("auc values decrease") OR ("_ days increased"))) OR ("i large decrease"))*.