Perhaps you should try some spelling variations:
"a largest decrease" » "a larger decrease" (Expand Search), "_ largest decrease" (Expand Search), "a large decrease" (Expand Search), "a latest decrease" (Expand Search)
"a marker decrease" » "a larger decrease" (Expand Search), "a marked increase" (Expand Search), "a markedly decreased" (Expand Search), "_ marker decrease" (Expand Search), "_ markers decrease" (Expand Search)
"c marked decrease" » "c marked increase" (Expand Search), "_ marked decrease" (Expand Search), "a marked decrease" (Expand Search), "n marked 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: (((("a largest decrease") OR ("a marker decrease"))) OR ("c marked decrease"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a largest decrease\") OR (\"a marker decrease\"))) OR (\"c marked decrease\"))".
• Removing quotes may allow a broader search: (((( a largest decrease ) OR ( a marker decrease ))) OR ( c marked decrease )).
• Adding a wildcard symbol may retrieve word variants: (((("a largest decrease") OR ("a marker decrease"))) OR ("c marked decrease"))*.