Perhaps you should try some spelling variations:
methods python » methods action (Expand search), pythons python (Expand search), methods method (Expand search)
decreased spp » decreased ph (Expand search), decreased sleep (Expand search), decreased sperm (Expand search)
and processes » and process (Expand search), and processing (Expand search)
spp decrease » spp increase (Expand search), speed decrease (Expand search), tip decreases (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (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 spp decrease AND processes ) OR ( python _ methods python programming ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decreased spp decrease and processes ) OR ( python _ methods python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreased spp decrease and processes ) OR ( python _ methods python programming ))*.