Perhaps you should try some spelling variations:
"coder coder responding convex programming" » "coder coder responding cone programming" (Expand search), "coder coder responding computer programming" (Expand search), "coder coder responding on programming" (Expand search), "coder note responding convex programming" (Expand search), "coder today responding convex programming" (Expand search), "coder comment responding convex programming" (Expand search), "coder decoder responding convex programming" (Expand search), "code code responding convex programming" (Expand search), "decoder codec responding convex programming" (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 responding convex programming") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder responding convex programming\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder responding convex programming ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder responding convex programming") OR ("_ python python python programming"))*.