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