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