Perhaps you should try some spelling variations:
"by computational coder execution problem" » "by computational code execution problem" (Expand search), "by computational codes execution problem" (Expand search), "by computational model execution problem" (Expand search), "by computational coder execution problems" (Expand search), "by computational coder evolution problem" (Expand search), "by computational coder execution parole" (Expand search), "_ computational coder execution problem" (Expand search), "and computational coder execution problem" (Expand search), "by computational over execution problem" (Expand search)
"teaching modeling vpython python programming" » "teaching model vpython python programming" (Expand search), "teaching models vpython python programming" (Expand search), "teaching modality vpython python programming" (Expand search), "teaching modeling method python programming" (Expand search), "teaching modeling python python programming" (Expand search), "teaching modeling pythons python programming" (Expand search), "teaching modeling piton 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 problem\") OR (\"teaching modeling vpython python programming\"))~".
• Removing quotes may allow a broader search: (( by computational coder execution problem ) OR ( teaching modeling vpython python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("by computational coder execution problem") OR ("teaching modeling vpython python programming"))*.