Perhaps you should try some spelling variations:
"coder coder density based program" » "coder cover density based program" (Expand search), "coder powder density based program" (Expand search), "coder power density based program" (Expand search), "coder decoder density based program" (Expand search), "code code density based program" (Expand search), "decoder codec density based program" (Expand search)
"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)

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 density based program") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder density based program\") OR (\"in python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder density based program ) OR ( in python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder density based program") OR ("in python python python programming"))*.