Perhaps you should try some spelling variations:
"coder coder spatial signal processing" » "coder coder spectral signal processing" (Expand search), "coder coder optical signal processing" (Expand search), "coder coder spatial social processing" (Expand search), "coder order spatial signal processing" (Expand search), "coder under spatial signal processing" (Expand search), "coder color spatial signal processing" (Expand search), "coder decoder spatial signal processing" (Expand search), "code code spatial signal processing" (Expand search), "decoder codec spatial signal 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 spatial signal processing") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder spatial signal processing\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder spatial signal processing ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder spatial signal processing") OR ("api python python python programming"))*.