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 lipid » increases lipid (Expand search), increased lipid (Expand search)
lipid decrease » rapid decrease (Expand search), ligand decrease (Expand search), limb decrease (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
decrease art » decrease akt (Expand search), decrease at (Expand search), decreased akt (Expand search)
art basic » at basic (Expand search), art brasil (Expand search), and basic (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 AND decreases sperm decrease ) OR ( decrease lipid decrease art basic ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease and decreases sperm decrease ) OR ( decrease lipid decrease art basic ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease and decreases sperm decrease ) OR ( decrease lipid decrease art basic ))*.