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