Perhaps you should try some spelling variations:
decrease disease » decreases disease (Expand search), increase disease (Expand search), increased disease (Expand search)
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)
python based » action 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: (( decreases sperm decrease disease process ) OR ( python based AND python programming ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decreases sperm decrease disease process ) OR ( python based and python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreases sperm decrease disease process ) OR ( python based and python programming ))*.