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