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)
package python » pacote python (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
decrease std » decrease sod (Expand search), decrease and (Expand search), decrease at (Expand search)
std decrease » to decrease (Expand search), and decrease (Expand search), spp decrease (Expand search)

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

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