Perhaps you should try some spelling variations:
"using coding coding semidefinite programming" » "using coding in semidefinite programming" (Expand search), "using coding convex semidefinite programming" (Expand search), "using coding on semidefinite programming" (Expand search), "using coding decoding semidefinite programming" (Expand search), "using coding using semidefinite programming" (Expand search), "using coding canine semidefinite programming" (Expand search), "using coping coding semidefinite programming" (Expand search), "using coating coding semidefinite programming" (Expand search), "using cooking coding semidefinite 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("using coding coding semidefinite programming") OR ("python python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using coding coding semidefinite programming\") OR (\"python python python python programming\"))".
• Removing quotes may allow a broader search: (( using coding coding semidefinite programming ) OR ( python python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using coding coding semidefinite programming") OR ("python python python python programming"))*.