Perhaps you should try some spelling variations:
"i largest decrease" » "i largest decreases" (Expand Search), "i larger decrease" (Expand Search), "i marked decrease" (Expand Search), "_ largest decrease" (Expand Search), "i large decrease" (Expand Search)
"c2 cases increased" » "c2 rate increased" (Expand Search), "c2 levels increased" (Expand Search), "152 cases increased" (Expand Search), "chd cases increased" (Expand Search), "123 cases increased" (Expand Search)
"_ large decrease" » "_ marked decrease" (Expand Search), "_ large increases" (Expand Search), "_ large degree" (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: "((((\"_ large decrease\") OR (\"c2 cases increased\"))) OR (\"i largest decrease\"))~".
• Removing quotes may allow a broader search: (((( _ large decrease ) OR ( c2 cases increased ))) OR ( i largest decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ large decrease") OR ("c2 cases increased"))) OR ("i largest decrease"))*.