Perhaps you should try some spelling variations:
decreased sperm » decreased sleep (Expand search)
sperm decrease » term decrease (Expand search), speed decrease (Expand search), speed decreases (Expand search)
risk processes » risk process (Expand search), work processes (Expand search), k processes (Expand search)
decrease risk » decreased risk (Expand search), increase risk (Expand search), decrease in (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
python and » python based (Expand search)
and python » in python (Expand search), on python (Expand search), api python (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: (( decreased sperm decrease risk processes ) OR ( python AND python python programming ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decreased sperm decrease risk processes ) OR ( python and python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreased sperm decrease risk processes ) OR ( python and python python programming ))*.