Perhaps you should try some spelling variations:
"coder precoding an optimization problem" » "coder precoding an optimization problems" (Expand search), "coherent precoding an optimization problem" (Expand search), "linear precoding an optimization problem" (Expand search), "coder precoding and optimization problem" (Expand search), "coder preceding and optimization problem" (Expand search), "coder precoding _ optimization problem" (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 precoding an optimization problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoding an optimization problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoding an optimization problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoding an optimization problem") OR ("api python python python programming"))*.