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