Perhaps you should try some spelling variations:
discharge material » discharge criteria (Expand search), discharge water (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.

• Removing quotes may allow a broader search: (( decrease and discharge material processes ) OR ( python code pitons python programming ))~.