Perhaps you should try some spelling variations:
discourse material » disclosure material (Expand search), course material (Expand search), discourse matrix (Expand search)
material processes » materials processes (Expand search), material processed (Expand search), materials processed (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
python code » python coding (Expand search), python redes (Expand search)
pitons » citons (Expand search), pitoni (Expand search), pitoes (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: (( decrease AND discourse material processes ) OR ( python code pitons python programming ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease and discourse material processes ) OR ( python code pitons python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease and discourse material processes ) OR ( python code pitons python programming ))*.