Perhaps you should try some spelling variations:
decrease conversion » urease conversion (Expand search), decrease cooperation (Expand search), database conversion (Expand search)
conversion program » concession program (Expand search), conversion from (Expand search), conversion process (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), ratio decrease (Expand search), rate increase (Expand search)
python codigo » python coding (Expand search), python code (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)

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

• Removing quotes may allow a broader search: (( decrease rate decrease conversion program ) OR ( python codigo python python programming ))~.