Perhaps you should try some spelling variations:
"significantly greatest decrease" » "significantly greater decrease" (Expand Search), "significantly related decrease" (Expand Search), "significantly increases decrease" (Expand Search), "significantly treatment decreased" (Expand Search), "significantly greater increase" (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 greatest decrease\") OR (\"significantly smaller decrease\"))~".
• Removing quotes may allow a broader search: (( significantly greatest decrease ) OR ( significantly smaller decrease ))~.
• Adding a wildcard symbol may retrieve word variants: (("significantly greatest decrease") OR ("significantly smaller decrease"))*.