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