Perhaps you should try some spelling variations:
"significantly elevated decrease" » "significantly greater decrease" (Expand Search), "significantly correlated decrease" (Expand Search), "significantly decreased decrease" (Expand Search), "significantly elevated depressive" (Expand Search), "significantly estimated decrease" (Expand Search)
"significantly longer decrease" » "significantly lower decrease" (Expand Search), "significantly larger decrease" (Expand Search), "significantly higher decrease" (Expand Search), "significantly linear decrease" (Expand Search), "significantly largest 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 elevated decrease") OR ("significantly longer decrease"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"significantly elevated decrease\") OR (\"significantly longer decrease\"))".
• Removing quotes may allow a broader search: (( significantly elevated decrease ) OR ( significantly longer decrease )).
• Adding a wildcard symbol may retrieve word variants: (("significantly elevated decrease") OR ("significantly longer decrease"))*.