Perhaps you should try some spelling variations:
"c cases increased" » "c rate increased" (Expand Search), "c levels increased" (Expand Search), "ic cases increased" (Expand Search), "_ cases increased" (Expand Search), "3 cases 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)
"c large decrease" » "c marked decrease" (Expand Search), "c large increases" (Expand Search), "c large degree" (Expand Search), "_ 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: "((((\"a large decrease\") OR (\"c large decrease\"))) OR (\"c cases increased\"))~".
• Removing quotes may allow a broader search: (((( a large decrease ) OR ( c large decrease ))) OR ( c cases increased ))~.
• Adding a wildcard symbol may retrieve word variants: (((("a large decrease") OR ("c large decrease"))) OR ("c cases increased"))*.