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)
codigo pythons » codigo python (Expand search), codigos python (Expand search)
pythons python » python python (Expand search), pitons python (Expand search), piton python (Expand search)
python codigo » python coding (Expand search), python code (Expand search)
decrease or » decrease of (Expand search), decrease on (Expand search), decrease in (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), to decrease (Expand search)

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

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