Perhaps you should try some spelling variations:
significantly better » significantly greater (Expand Search), significantly higher (Expand Search), significantly lower (Expand Search)
significantly a » significantly _ (Expand Search), significantly i (Expand Search), significantly vary (Expand Search)
better decrease » greater decrease (Expand Search), teer decrease (Expand Search), between decreased (Expand Search)
a decrease » _ decrease (Expand Search), _ decreased (Expand Search), _ decreases (Expand Search)

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

• Removing quotes may allow a broader search: (( significantly a decrease ) OR ( significantly better decrease )).