Perhaps you should try some spelling variations:
decrease rotating » decrease replacing (Expand search), decrease lodging (Expand search), decrease owing (Expand search)
decrease rapidly » disease rapidly (Expand search), decrease lipid (Expand search)
rapidly decrease » rapid decrease (Expand search), rapid increase (Expand search), taping decrease (Expand search)
rotating objects » cutting objects (Expand search), counting objects (Expand search), rotating jets (Expand search)
decreases sperm » decreased sperm (Expand search), decreases serum (Expand search), decreasing sperm (Expand search)
sperm decrease » term decrease (Expand search), speed decrease (Expand search), speed decreases (Expand search)
on decreases » or decreases (Expand search), on decrease (Expand search), on decreased (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease or (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease on decreases sperm decrease ) OR ( decrease rapidly decrease rotating objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease on decreases sperm decrease ) OR ( decrease rapidly decrease rotating objects ))*.