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