Perhaps you should try some spelling variations:
"c marked decrease" » "c marked increase" (Expand Search), "_ marked decrease" (Expand Search), "a marked decrease" (Expand Search), "n marked decrease" (Expand Search)
"c2 cases increased" » "c2 levels increased" (Expand Search), "c2 cycles increases" (Expand Search), "822 cases increased" (Expand Search), "629 cases increased" (Expand Search), "123 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("c larger decrease") OR ("c marked decrease"))) OR ("c2 cases increased"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"c larger decrease\") OR (\"c marked decrease\"))) OR (\"c2 cases increased\"))*".
• Removing quotes may allow a broader search: (((( c larger decrease ) OR ( c marked decrease ))) OR ( c2 cases increased ))*.