Perhaps you should try some spelling variations:
"coder coder subset open problems" » "coder coder subset on problems" (Expand search), "coder core subset open problems" (Expand search), "coder codes sumset open problems" (Expand search), "coder cd31 subset open problems" (Expand search), "coder decoder subset open problems" (Expand search), "code code subset open problems" (Expand search), "decoder codec subset open problems" (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 subset open problems") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder subset open problems\") OR (\"in python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder subset open problems ) OR ( in python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder subset open problems") OR ("in python python python programming"))*.