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)
"c large decrease" » "c large increases" (Expand Search), "c large degree" (Expand Search), "_ large decrease" (Expand Search), "a large decrease" (Expand Search), "i large decrease" (Expand Search)
"chd rate increased" » "chd greater increase" (Expand Search), "cue rate increased" (Expand Search), "bd rate increased" (Expand Search), "khz rate increased" (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 large decrease") OR ("c marked decrease"))) OR ("chd rate increased"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"c large decrease\") OR (\"c marked decrease\"))) OR (\"chd rate increased\"))".
• Removing quotes may allow a broader search: (((( c large decrease ) OR ( c marked decrease ))) OR ( chd rate increased )).
• Adding a wildcard symbol may retrieve word variants: (((("c large decrease") OR ("c marked decrease"))) OR ("chd rate increased"))*.