Perhaps you should try some spelling variations:
"using complex _ precoder program" » "using complex _ proder program" (Expand search), "using complex _ recovery program" (Expand search), "using complex _ precoce programa" (Expand search), "housing complex _ precoder program" (Expand search), "using computer _ precoder program" (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("using complex _ precoder program") OR ("using codigo python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using complex _ precoder program\") OR (\"using codigo python python programming\"))".
• Removing quotes may allow a broader search: (( using complex _ precoder program ) OR ( using codigo python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using complex _ precoder program") OR ("using codigo python python programming"))*.