Perhaps you should try some spelling variations:
"random perturbations in precoder program" » "and perturbations in precoder program" (Expand search), "under perturbations in precoder program" (Expand search), "and perturbation in precoder program" (Expand search), "random perturbations in proder program" (Expand search), "random perturbations in recovery program" (Expand search), "random perturbations in precoce programa" (Expand search), "random perturbations in premodern program" (Expand search), "random perturbations and precoder program" (Expand search), "random perturbations to precoder 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: "((\"random perturbations in precoder program\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( random perturbations in precoder program ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("random perturbations in precoder program") OR ("using coding python python programming"))*.