Perhaps you should try some spelling variations:
"coder coder based course problem" » "coder coder based source problem" (Expand search), "coder coder based core problem" (Expand search), "coder coder based curve problem" (Expand search), "coder decoder based course problem" (Expand search), "code code based course problem" (Expand search), "decoder codec based course problem" (Expand search), "coder code based course problem" (Expand search), "coder foder based course problem" (Expand search), "coder codec based course problem" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ 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: (("coder coder based course problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder based course problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder based course problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder based course problem") OR ("_ python python python programming"))*.