Perhaps you should try some spelling variations:
litter programming » linear programming (Expand search), ladder programming (Expand search), literate programming (Expand search)
decrease litter » increased litter (Expand search), decrease after (Expand search), decreases liver (Expand search)
function using » function during (Expand search), reaction using (Expand search)
decrease will » decrease with (Expand search), decrease il (Expand search), decrease cell (Expand search)
photon python » piton python (Expand search), photon photon (Expand search), pitons python (Expand search)
using photon » using proton (Expand search), using photo (Expand search), using diphoton (Expand search)

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

• Removing quotes may allow a broader search: (( decrease will decrease litter programming ) OR ( function using photon python programming ))~.