Perhaps you should try some spelling variations:
"coherent precoding coding variants of" » "coherent precoding using variants of" (Expand search), "coherent precoding combining variants of" (Expand search), "coherent precoding coding variation of" (Expand search), "coherent precoding coding variants in" (Expand search), "coherent precoding coding variables of" (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: (("coherent precoding coding variants of") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coherent precoding coding variants of\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coherent precoding coding variants of ) OR ( api python python python programming ))*.