Perhaps you should try some spelling variations:
significantly weaker » significantly greater (Expand Search), significantly better (Expand Search), significantly related (Expand Search)
significantly onto » significantly longer (Expand Search), significantly lower (Expand Search), significantly worse (Expand Search)
weaker decrease » greater decrease (Expand Search), teer decrease (Expand Search), water decreases (Expand Search)
onto decrease » point decrease (Expand Search), nn decrease (Expand Search)

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

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