Perhaps you should try some spelling variations:
populations using » formulations using (Expand search), populations and (Expand search)
locking pitons » loading pistons (Expand search)
parse program » purse program (Expand search), care program (Expand search), party program (Expand search)
using locking » using docking (Expand search), using stacking (Expand search), using tracking (Expand search)
using parse » using coarse (Expand search), using pade (Expand search), using part (Expand search)

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

• Removing quotes may allow a broader search: (( AND populations using parse program ) OR ( using locking pitons python programming ))*.