Perhaps you should try some spelling variations:
"coder precoder scheme linear programing" » "coder precoder scheme linear programming" (Expand search), "coder precoder scheme linear programmin" (Expand search), "coder precoder scheme linear program" (Expand search), "coder precoding scheme linear programing" (Expand search), "coder decoder scheme linear programing" (Expand search), "coder precoder some linear programing" (Expand search), "coder precoder scheme lne2s programing" (Expand search), "coder precoder schemes near programing" (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 linear programing") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder scheme linear programing\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder precoder scheme linear programing ) OR ( api python python python programming ))*.