Perhaps you should try some spelling variations:
"coder coder decoding an introduction" » "coder coding decoding an introduction" (Expand search), "coder coder decoder an introduction" (Expand search), "coder barcode decoding an introduction" (Expand search), "coder decoder decoding an introduction" (Expand search), "code code decoding an introduction" (Expand search), "decoder codec decoding an introduction" (Expand search), "coder coder decoding and introduction" (Expand search), "coder coder decoding in introduction" (Expand search), "coder coder recording an introduction" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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: (("coder coder decoding an introduction") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder decoding an introduction\") OR (\"on python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder decoding an introduction ) OR ( on python python python programming ))*.