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