Perhaps you should try some spelling variations:
"using perturbation from precoder program" » "in perturbation from precoder program" (Expand search), "packing perturbation from precoder program" (Expand search), "and perturbation from precoder program" (Expand search), "using perturbations from precoder program" (Expand search), "using perturbation of precoder program" (Expand search), "using perturbation to precoder program" (Expand search), "using perturbation from proder program" (Expand search), "using perturbation from recovery program" (Expand search), "using perturbation from precoce programa" (Expand search), "using perturbation from proper program" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking python python programming" (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using perturbation from precoder program\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( using perturbation from precoder program ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using perturbation from precoder program") OR ("using coding python python programming"))*.