Perhaps you should try some spelling variations:
"coder python codigo python program" » "coder python codigo action program" (Expand search), "coder python coding python program" (Expand search), "coder python code python program" (Expand search), "compra python codigo python program" (Expand search)
"using model vpython python programming" » "using model vpython action programming" (Expand search), "using model python python programming" (Expand search), "using model pythons python programming" (Expand search), "using model piton python programming" (Expand search), "using modeling vpython python programming" (Expand search), "using modulo python python programming" (Expand search), "ising model vpython python programming" (Expand search), "using modis vpython python programming" (Expand search), "using mobile vpython 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: (("coder python codigo python program") OR ("using model vpython python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder python codigo python program\") OR (\"using model vpython python programming\"))*".
• Removing quotes may allow a broader search: (( coder python codigo python program ) OR ( using model vpython python programming ))*.