Perhaps you should try some spelling variations:
"coder coder nonconvex c programming" » "coder coder nonconvex _ programming" (Expand search), "coder coder nonconvex cone programming" (Expand search), "coder coder nonconvex and programming" (Expand search), "coder decoder nonconvex c programming" (Expand search), "code code nonconvex c programming" (Expand search), "decoder codec nonconvex c programming" (Expand search), "coder coder nonconvex arc programming" (Expand search), "coder coder nonconvex box 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 nonconvex c programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder nonconvex c programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder nonconvex c programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder nonconvex c programming") OR ("api python python python programming"))*.