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