Perhaps you should try some spelling variations:
"coder decoder complexity dsp processing" » "coder code complexity dsp processing" (Expand search), "coder receiver complexity dsp processing" (Expand search), "coder model complexity dsp processing" (Expand search), "coder decoder complexity dc processing" (Expand search), "coder decoder complexity doi processing" (Expand search), "coder decoder complexity esl processing" (Expand search), "coder decoder complexity psp processing" (Expand search), "coder decoder complexity app processing" (Expand search), "coder decoder complexity hhp processing" (Expand search), "encoder decoder complexity dsp 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)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder decoder complexity dsp processing") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder complexity dsp processing\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder complexity dsp processing ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder complexity dsp processing") OR ("api python python python programming"))*.