Perhaps you should try some spelling variations:
"_ computational coder execution time" » "_ computational code execution time" (Expand search), "_ computational codes execution time" (Expand search), "_ computational model execution time" (Expand search), "_ computational over execution time" (Expand search)
"learning python python python programming" » "learning paths python python programming" (Expand search), "learning path python python programming" (Expand search), "learning pythons python python programming" (Expand search), "learning piton python python programming" (Expand search), "learning pitons 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: (("_ computational coder execution time") OR ("learning python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"_ computational coder execution time\") OR (\"learning python python python programming\"))".
• Removing quotes may allow a broader search: (( _ computational coder execution time ) OR ( learning python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("_ computational coder execution time") OR ("learning python python python programming"))*.