Perhaps you should try some spelling variations:
"coder coder efficient semidefinite programming" » "coder power efficient semidefinite programming" (Expand search), "coder codec efficiency semidefinite programming" (Expand search), "coder codes efficiency semidefinite programming" (Expand search), "coder decoder efficient semidefinite programming" (Expand search), "code code efficient semidefinite programming" (Expand search), "decoder codec efficient semidefinite programming" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api 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 efficient semidefinite programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder efficient semidefinite programming\") OR (\"api python python python programming\"))".
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• Adding a wildcard symbol may retrieve word variants: (("coder coder efficient semidefinite programming") OR ("api python python python programming"))*.