Perhaps you should try some spelling variations:
decreased quality » decrease quality (Expand search), increased quality (Expand search), decreased ability (Expand search)
quality problems » quality programs (Expand search), quality program (Expand search), quality protein (Expand search)
the decreased » the decrease (Expand search), the deceased (Expand search), the increased (Expand search)
decrease the » decreases the (Expand search), decrease of (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease the decreased quality problems ) OR ( decrease _ decrease in decrease ))~.