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