Perhaps you should try some spelling variations:
"auc values decrease" » "auc values increased" (Expand Search), "auc largest decrease" (Expand Search)
"i marked decrease" » "i marked increase" (Expand Search), "_ marked decrease" (Expand Search), "_ market decrease" (Expand Search), "_ marker decrease" (Expand Search)
"5 mass increased" » "5 cases increased" (Expand Search), "5 causes increased" (Expand Search), "5 costs increased" (Expand Search), "15 mass increased" (Expand Search), "_ mass increased" (Expand Search), "a mass increased" (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 (\"5 mass increased\"))) OR (\"i marked decrease\"))~".
• Removing quotes may allow a broader search: (((( auc values decrease ) OR ( 5 mass increased ))) OR ( i marked decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((("auc values decrease") OR ("5 mass increased"))) OR ("i marked decrease"))*.