Perhaps you should try some spelling variations:
"coder precoder online convex programming" » "coder precoder online cone programming" (Expand search), "coder precoder online computer programming" (Expand search), "coder precos online convex programming" (Expand search), "coder aprender online convex programming" (Expand search), "coder percecoes online convex programming" (Expand search), "coder decoder online convex programming" (Expand search), "coder precoder online context programming" (Expand search), "coder precoder online contexts programming" (Expand search), "coder precoder online content 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 precoder online convex programming") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder online convex programming\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder online convex programming ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder online convex programming") OR ("_ python python python programming"))*.