Perhaps you should try some spelling variations:
"by computational coder execution problems" » "by computational code execution problems" (Expand search), "by computational codes execution problems" (Expand search), "by computational model execution problems" (Expand search), "by computational coder execution process" (Expand search), "by computational coder evolution problems" (Expand search), "by computational coder selection problems" (Expand search), "_ computational coder execution problems" (Expand search), "and computational coder execution problems" (Expand search), "by computational over execution problems" (Expand search)
"using model vpython python programming" » "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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"by computational coder execution problems\") OR (\"using model vpython python programming\"))~".
• Removing quotes may allow a broader search: (( by computational coder execution problems ) OR ( using model vpython python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("by computational coder execution problems") OR ("using model vpython python programming"))*.