Perhaps you should try some spelling variations:
decreased semen » decreased level (Expand search), decreased sleep (Expand search), decreased serum (Expand search)
semen decrease » stent decrease (Expand search), speed decrease (Expand search), times decrease (Expand search)
like processes » like process (Expand search), like proteases (Expand search), like protease (Expand search)
methods python » methods action (Expand search), pythons python (Expand search), methods method (Expand search)
decrease like » decrease liver (Expand search), decreases liver (Expand search), decrease litter (Expand search)
based methods » based method (Expand search), mixed methods (Expand search), and methods (Expand search)
python based » action based (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: "(( decreased semen decrease like processes ) OR ( python based methods python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreased semen decrease like processes ) OR ( python based methods python programming ))*.