Perhaps you should try some spelling variations:
"coding coding _ convex programming" » "coding coding _ cone programming" (Expand search), "coding coding _ computer programming" (Expand search), "coding decoding _ convex programming" (Expand search), "coding using _ convex programming" (Expand search), "coding canine _ convex programming" (Expand search)
"python python python python programming" » "pythons python pythons python programming" (Expand search), "piton python piton python programming" (Expand search), "pitons python pitons python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coding coding _ convex programming\") OR (\"python python python python programming\"))~".
• Removing quotes may allow a broader search: (( coding coding _ convex programming ) OR ( python python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coding coding _ convex programming") OR ("python python python python programming"))*.