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