Perhaps you should try some spelling variations:
"an introduction python python programming" » "an introduction section python programming" (Expand search), "an introduction earthen python programming" (Expand search), "an introduction methods python programming" (Expand search), "an introduction pythons python programming" (Expand search), "an introduction piton python programming" (Expand search), "an introduction pitons python programming" (Expand search)
"coder solution _ apache programa" » "code solution _ apache programa" (Expand search), "powder solution _ apache programa" (Expand search), "copper solution _ apache programa" (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 solution _ apache programa") OR ("an introduction python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder solution _ apache programa\") OR (\"an introduction python python programming\"))".
• Removing quotes may allow a broader search: (( coder solution _ apache programa ) OR ( an introduction python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder solution _ apache programa") OR ("an introduction python python programming"))*.