Perhaps you should try some spelling variations:
computation using » computations using (Expand search), computation in (Expand search), composition using (Expand search)
ranking python » ranking method (Expand search), ranking position (Expand search)
safer program » safety program (Expand search), water program (Expand search), seer program (Expand search)
using ranking » using stacking (Expand search), using resting (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
using safer » using sar (Expand search), using sage (Expand search)

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

• Removing quotes may allow a broader search: (( AND computation using safer program ) OR ( using ranking python python programming ))~.