Perhaps you should try some spelling variations:
"coder coder information theory problems" » "coder codes information theory problems" (Expand search), "coder cover information theory problems" (Expand search), "coder modern information theory problems" (Expand search), "coder coder information theory problem" (Expand search), "coder coder information their problems" (Expand search), "coder coder information therapy problems" (Expand search), "coder decoder information theory problems" (Expand search), "code code information theory problems" (Expand search), "decoder codec information theory problems" (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 coder information theory problems") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder information theory problems\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder information theory problems ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder information theory problems") OR ("_ python python python programming"))*.