Perhaps you should try some spelling variations:
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ python python python programming" (Expand search)
"coder coder and spectral function" » "coder decoder and spectral function" (Expand search), "code code and spectral function" (Expand search), "decoder codec and spectral function" (Expand search), "coder code and spectral function" (Expand search), "coder codes and spectral function" (Expand search), "coder poder and spectral function" (Expand search), "coder coder and spectra function" (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 and spectral function") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder and spectral function\") OR (\"in python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder and spectral function ) OR ( in python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder and spectral function") OR ("in python python python programming"))*.