Perhaps you should try some spelling variations:
significantly increase » significantly increased (Expand Search), significant increase (Expand Search), significantly decreased (Expand Search)
significantly impaired » significantly impairs (Expand Search), significantly improved (Expand Search), significantly improve (Expand Search)
increase decrease » increased release (Expand Search), increased crash (Expand Search)
impaired decrease » marked decrease (Expand Search)

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

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