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