Perhaps you should try some spelling variations:
"_ values decrease" » "_ values increased" (Expand Search), "_ largest decrease" (Expand Search)
"c large decrease" » "c marked decrease" (Expand Search), "c large increases" (Expand Search), "c large degree" (Expand Search), "_ large decrease" (Expand Search), "a large decrease" (Expand Search), "i large decrease" (Expand Search)
"ct levels increased" » "c levels increased" (Expand Search), "wt levels increased" (Expand Search), "cd levels 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: "((((\"c large decrease\") OR (\"ct levels increased\"))) OR (\"_ values decrease\"))~".
• Removing quotes may allow a broader search: (((( c large decrease ) OR ( ct levels increased ))) OR ( _ values decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((("c large decrease") OR ("ct levels increased"))) OR ("_ values decrease"))*.