Perhaps you should try some spelling variations:
"coder coder in subspace problem" » "coder coder in substance problem" (Expand search), "coder coder in obstacle problem" (Expand search), "coder coder in subgraph problem" (Expand search), "coder decoder in subspace problem" (Expand search), "code code in subspace problem" (Expand search), "decoder codec in subspace problem" (Expand search), "coder coder in subspaces problem" (Expand search), "coder coder via subspace problem" (Expand search), "coder code in subspace problem" (Expand search), "coder codes in subspace problem" (Expand search), "coder poder in subspace problem" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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 in subspace problem") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder in subspace problem\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder in subspace problem ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder in subspace problem") OR ("on python python python programming"))*.