Perhaps you should try some spelling variations:
significantly increased » significant increase (Expand Search)
significantly poorer » significantly shorter (Expand Search), significantly lower (Expand Search), significantly longer (Expand Search)
increased decrease » increased release (Expand Search), increased crash (Expand Search)
poorer decrease » scores decreased (Expand Search)

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

• Removing quotes may allow a broader search: (( significantly increased decrease ) OR ( significantly poorer decrease ))*.