Perhaps you should try some spelling variations:
decrease activity » secretase activity (Expand search), increased activity (Expand search), increases activity (Expand search)
ratio decrease » to decrease (Expand search), rats decreases (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
cover ratio » cover rate (Expand search), coverage ratio (Expand search), cover fraction (Expand search)
python code » python coding (Expand search), python redes (Expand search)
code python » codigo python (Expand search), pacote python (Expand search)

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

• Removing quotes may allow a broader search: (( cover ratio decrease activity program ) OR ( python code python python programming ))~.