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