Perhaps you should try some spelling variations:
"coder coder based singal processing" » "coder coder based singnal processing" (Expand search), "coder coder based signal processing" (Expand search), "coder coder based sandal processing" (Expand search), "coder coder based single processing" (Expand search), "coder coder based fungal processing" (Expand search), "coder decoder based singal processing" (Expand search), "code code based singal processing" (Expand search), "decoder codec based singal processing" (Expand search), "coder code based singal processing" (Expand search), "coder foder based singal processing" (Expand search), "coder codec based singal processing" (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 coder based singal processing") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder based singal processing\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder based singal processing ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder based singal processing") OR ("api python python python programming"))*.