Perhaps you should try some spelling variations:
"au_ values decrease" » "au_ values increased" (Expand Search), "au_ largest decrease" (Expand Search), "auc values decrease" (Expand Search), "_ values decrease" (Expand Search), "all values decrease" (Expand Search)
"i rate increased" » "i greater increase" (Expand Search), "_ rate increased" (Expand Search), "i race increased" (Expand Search), "a rate increased" (Expand Search)
"a large decrease" » "a marked decrease" (Expand Search), "a large increases" (Expand Search), "a large degree" (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: "((((\"i rate increased\") OR (\"au_ values decrease\"))) OR (\"a large decrease\"))~".
• Removing quotes may allow a broader search: (((( i rate increased ) OR ( au_ values decrease ))) OR ( a large decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((("i rate increased") OR ("au_ values decrease"))) OR ("a large decrease"))*.