Perhaps you should try some spelling variations:
"teaching complexity _ precoder program" » "teaching complex _ precoder program" (Expand search), "teaching community _ precoder program" (Expand search), "teaching complexity _ proder program" (Expand search), "teaching complexity _ recovery program" (Expand search), "teaching complexity _ precoce programa" (Expand search)
"using codigo python python programming" » "using codigo pythons python programming" (Expand search), "using codigo piton python programming" (Expand search), "using codigo pitons python programming" (Expand search), "using indigo python python programming" (Expand search), "using coding python python programming" (Expand search), "using codium 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: "((\"teaching complexity _ precoder program\") OR (\"using codigo python python programming\"))~".
• Removing quotes may allow a broader search: (( teaching complexity _ precoder program ) OR ( using codigo python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("teaching complexity _ precoder program") OR ("using codigo python python programming"))*.