Perhaps you should try some spelling variations:
"coder precoder scheme vaccine program" » "coder precoding scheme vaccine program" (Expand search), "coder precoder scheme vaccine programs" (Expand search), "coder precoder scheme medicine program" (Expand search), "coder precoder scheme vaccine proposal" (Expand search), "coder decoder scheme vaccine program" (Expand search), "coder precoder home vaccine program" (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 precoder scheme vaccine program") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder scheme vaccine program\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder scheme vaccine program ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder scheme vaccine program") OR ("api python python python programming"))*.