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