Perhaps you should try some spelling variations:
"significantly smaller decrease" » "significantly higher decrease" (Expand Search), "significantly lower decrease" (Expand Search), "significantly greater decrease" (Expand Search), "significantly small decrease" (Expand Search), "significantly marked decrease" (Expand Search), "significantly smaller areas" (Expand Search)
"significantly worse decrease" » "significantly shorter decrease" (Expand Search), "significantly larger decrease" (Expand Search), "significantly longer decrease" (Expand Search), "significantly we 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: (("significantly smaller decrease") OR ("significantly worse decrease"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"significantly smaller decrease\") OR (\"significantly worse decrease\"))".
• Removing quotes may allow a broader search: (( significantly smaller decrease ) OR ( significantly worse decrease )).
• Adding a wildcard symbol may retrieve word variants: (("significantly smaller decrease") OR ("significantly worse decrease"))*.