Perhaps you should try some spelling variations:
"coder coder triangular semidefinite programming" » "coder coder nonregular semidefinite programming" (Expand search), "coder poder triangular semidefinite programming" (Expand search), "coder lower triangular semidefinite programming" (Expand search), "coder node triangular semidefinite programming" (Expand search), "coder decoder triangular semidefinite programming" (Expand search), "code code triangular semidefinite programming" (Expand search), "decoder codec triangular semidefinite 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 triangular semidefinite programming") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder triangular semidefinite programming\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder triangular semidefinite programming ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder triangular semidefinite programming") OR ("_ python python python programming"))*.