Perhaps you should try some spelling variations:
"coder decoder cone programming problem" » "coder decoder cone programming problems" (Expand search), "coder decoder and programming problem" (Expand search), "coder decoder computer programming problem" (Expand search), "coder decoder _ programming problem" (Expand search), "encoder decoder cone programming problem" (Expand search), "coder decoder codec programming problem" (Expand search), "coder decoder codecs programming problem" (Expand search), "coder decoder model programming problem" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons 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 cone programming problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder cone programming problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder cone programming problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder cone programming problem") OR ("_ python python python programming"))*.