Perhaps you should try some spelling variations:
"coder coder sample detection problem" » "coder coder sample selection problem" (Expand search), "coder coder sample prediction problem" (Expand search), "coder coder sample collection problem" (Expand search), "coder coder simple detection problem" (Expand search), "coder coder sampling detection problem" (Expand search), "coder modern sample detection problem" (Expand search), "coder cover samples detection problem" (Expand search), "coder code samples detection problem" (Expand search), "coder decoder sample detection problem" (Expand search), "code code sample detection problem" (Expand search), "decoder codec sample detection 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 sample detection problem") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder sample detection problem\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder sample detection problem ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder sample detection problem") OR ("on python python python programming"))*.