Perhaps you should try some spelling variations:
"coder coder ofdm and programming" » "coder coder ofdm _ programming" (Expand search), "coder coder ofdm goal programming" (Expand search), "coder decoder ofdm and programming" (Expand search), "code code ofdm and programming" (Expand search), "decoder codec ofdm and programming" (Expand search), "coder coded ofdm and programming" (Expand search), "coder coded gfdm and programming" (Expand search), "coder modem ofdm and programming" (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 ofdm and programming") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder ofdm and programming\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder ofdm and programming ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder ofdm and programming") OR ("api python python python programming"))*.