Perhaps you should try some spelling variations:
"coder coder c teaching programming" » "coder coder c teaching program" (Expand search), "coder decoder c teaching programming" (Expand search), "code code c teaching programming" (Expand search), "decoder codec c teaching programming" (Expand search), "coder coder kbc teaching programming" (Expand search), "coder coder bec teaching programming" (Expand search), "coder coder fmc teaching programming" (Expand search), "poder coder c teaching programming" (Expand search), "coders _oder c teaching programming" (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 c teaching programming") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder c teaching programming\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder c teaching programming ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder c teaching programming") OR ("on python python python programming"))*.