Perhaps you should try some spelling variations:
"coder coding schefer convex programming" » "coder coding schefer cone programming" (Expand search), "coder coding schefer computer programming" (Expand search), "coder coding scheme convex programming" (Expand search), "coder coding schemes convex programming" (Expand search), "coder encoding schemes convex programming" (Expand search), "modern coding schefer convex programming" (Expand search), "color coding schefer convex programming" (Expand search), "odor coding schefer convex 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), "rpa python python python programming" (Expand search), "manim python 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 coding schefer convex programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding schefer convex programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coding schefer convex programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coding schefer convex programming") OR ("api python python python programming"))*.