Perhaps you should try some spelling variations:
"coder precoding _ efficient coding" » "coder precoding _ efficient routing" (Expand search), "coder precoding _ efficient cement" (Expand search), "coherent precoding _ efficient coding" (Expand search), "linear precoding _ efficient 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)

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