Perhaps you should try some spelling variations:
"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)
"coder coder basic signal processing" » "coder coder based signal processing" (Expand search), "coder coder music signal processing" (Expand search), "coder coder music signals processing" (Expand search), "coder decoder basic signal processing" (Expand search), "code code basic signal processing" (Expand search), "decoder codec basic signal processing" (Expand search), "coder model basic signal processing" (Expand search), "coder under basic signal processing" (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: "((\"coder coder basic signal processing\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder basic signal processing ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder basic signal processing") OR ("api python python python programming"))*.