Perhaps you should try some spelling variations:
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons python python programming" (Expand search)
"coder coding c efficient coding" » "modern coding c efficient coding" (Expand search), "color coding c efficient coding" (Expand search), "odor coding c efficient coding" (Expand search), "coder coding co efficient coding" (Expand search), "coder coding _ efficient coding" (Expand search), "coder coding 2 efficient coding" (Expand search), "coder coding h efficient coding" (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 coding c efficient coding") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding c efficient coding\") OR (\"_ python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coding c efficient coding ) OR ( _ python python python programming ))*.