Perhaps you should try some spelling variations:
"coder coder under semidefinite programming" » "coder coder and semidefinite programming" (Expand search), "coder coder convex semidefinite programming" (Expand search), "coder coder linear semidefinite programming" (Expand search), "coder decoder under semidefinite programming" (Expand search), "code code under semidefinite programming" (Expand search), "decoder codec under semidefinite programming" (Expand search), "coder code under semidefinite programming" (Expand search), "coder cover under semidefinite programming" (Expand search), "coder clover under semidefinite programming" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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 under semidefinite programming") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder under semidefinite programming\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder under semidefinite programming ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder under semidefinite programming") OR ("on python python python programming"))*.