Perhaps you should try some spelling variations:
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)
decrease image » decrease age (Expand search), decrease intimate (Expand search), decreases immune (Expand search)
the decreases » the decrease (Expand search), the decreased (Expand search), use decreases (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and decrease (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease the decreases sperm decrease ) OR ( decrease NOT decrease image processing ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease the decreases sperm decrease ) OR ( decrease not decrease image processing ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease the decreases sperm decrease ) OR ( decrease not decrease image processing ))*.