Perhaps you should try some spelling variations:
"codes and coverage channel coding" » "codes and average channel coding" (Expand search), "codes and coverage change coding" (Expand search), "codes and covert channel coding" (Expand search), "codes and coverage channel using" (Expand search), "codes and cover channel coding" (Expand search), "code and coverage channel coding" (Expand search), "modes and coverage channel coding" (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"codes and coverage channel coding\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( codes and coverage channel coding ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("codes and coverage channel coding") OR ("api python python python programming"))*.