Perhaps you should try some spelling variations:
decreased sperm » decreased sleep (Expand search)
going processes » ageing processes (Expand search), posing processes (Expand search), aging processes (Expand search)
sperm decrease » term decrease (Expand search), speed decrease (Expand search), speed decreases (Expand search)
decrease going » decrease owing (Expand search), decrease lodging (Expand search), decrease during (Expand search)
methods python » methods action (Expand search), pythons python (Expand search), methods method (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 going processes ) OR ( python _ methods python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreased sperm decrease going processes ) OR ( python _ methods python programming ))*.