Perhaps you should try some spelling variations:
"a marker increases" » "a marked increases" (Expand Search), "a marked increase" (Expand Search), "a larger increases" (Expand Search), "_ marker increases" (Expand Search), "_ markers increases" (Expand Search)
"c marked decrease" » "c marked increase" (Expand Search), "_ marked decrease" (Expand Search), "a marked decrease" (Expand Search), "n marked decrease" (Expand Search)
"c larger decrease" » "_ larger decrease" (Expand Search), "c large decrease" (Expand Search), "_ large decrease" (Expand Search)

Try widening your search to All Fields.

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 ("a marker increases"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"c larger decrease\") OR (((\"c marked decrease\") OR (\"a marker increases\"))))".
• Removing quotes may allow a broader search: (( c larger decrease ) OR ((( c marked decrease ) OR ( a marker increases )))).
• Adding a wildcard symbol may retrieve word variants: (("c larger decrease") OR ((("c marked decrease") OR ("a marker increases"))))*.