Perhaps you should try some spelling variations:
"coder coder modular design problem" » "coder pode modular design problem" (Expand search), "coder podem modular design problem" (Expand search), "coder modelo modular design problem" (Expand search), "coder decoder modular design problem" (Expand search), "code code modular design problem" (Expand search), "decoder codec modular design 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 coder modular design problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder modular design problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder modular design problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder modular design problem") OR ("_ python python python programming"))*.