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