Perhaps you should try some spelling variations:
decreased sperm » decreased sleep (Expand search)
costs processes » loss processes (Expand search), crisis processes (Expand search), cosine processes (Expand search)
sperm decrease » term decrease (Expand search), speed decrease (Expand search), speed decreases (Expand search)
decrease costs » decreasing costs (Expand search), decreases post (Expand search), disease costs (Expand search)
method python » method method (Expand search), python python (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 sperm decrease costs processes ) OR ( python based method python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreased sperm decrease costs processes ) OR ( python based method python programming ))*.