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