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