Perhaps you should try some spelling variations:
"using populations using computer program" » "using population using computer program" (Expand search), "aging populations using computer program" (Expand search), "fishing populations using computer program" (Expand search), "using formulations using computer program" (Expand search), "using populations and computer 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 populations using computer program") OR ("using codigo python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using populations using computer program\") OR (\"using codigo python python programming\"))".
• Removing quotes may allow a broader search: (( using populations using computer program ) OR ( using codigo python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using populations using computer program") OR ("using codigo python python programming"))*.