Perhaps you should try some spelling variations:
"significantly correlated decrease" » "significantly increased decrease" (Expand Search), "significant correlation decrease" (Expand Search), "significantly associated decrease" (Expand Search)
"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)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"significantly smaller decrease\") OR (\"significantly correlated decrease\"))~".
• Removing quotes may allow a broader search: (( significantly smaller decrease ) OR ( significantly correlated decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (("significantly smaller decrease") OR ("significantly correlated decrease"))*.