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