Perhaps you should try some spelling variations:
decrease mechanical » disease mechanical (Expand search), database mechanical (Expand search)
mechanical testing » mechanical tests (Expand search)
notes decrease » not decrease (Expand search), quotas decrease (Expand search), not decreased (Expand search)
pythons python » python python (Expand search), pitons python (Expand search), piton python (Expand search)
python code » python coding (Expand search), python redes (Expand search)
code notes » corde notes (Expand search), coffe notes (Expand search), some notes (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( code notes decrease mechanical testing ) OR ( python code pythons python programming ))~.