Perhaps you should try some spelling variations:
locking pythons » blocking methods (Expand search)
computation in » computation and (Expand search), computation of (Expand search), imputation in (Expand search)
pythons python » python python (Expand search), pitons python (Expand search), piton python (Expand search)
using locking » using docking (Expand search), using stacking (Expand search), using tracking (Expand search)
ddr program » r program (Expand search), ladder program (Expand search), year program (Expand search)
in ddr » in dar (Expand search), in ddm (Expand search)

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

• Removing quotes may allow a broader search: (( AND computation in ddr program ) OR ( using locking pythons python programming ))*.