Perhaps you should try some spelling variations:
"coder precoder some semidefinite programming" » "coder precoder on semidefinite programming" (Expand search), "coder precoder the semidefinite programming" (Expand search), "coder precoder set semidefinite programming" (Expand search), "coder decoder some semidefinite programming" (Expand search), "coder precoder scheme semidefinite programming" (Expand search), "coder aprender some semidefinite programming" (Expand search), "coder precoce nome 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 precoder some semidefinite programming") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder some semidefinite programming\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder some semidefinite programming ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder some semidefinite programming") OR ("_ python python python programming"))*.