Perhaps you should try some spelling variations:
decrease survival » decreased survival (Expand search), decreases survival (Expand search), increase survival (Expand search)
survival program » survival progress (Expand search), survival nomogram (Expand search), survival from (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)
data python » dado python (Expand search), gate python (Expand search), dados python (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 survival program ) OR ( python data python python programming ))~.