Perhaps you should try some spelling variations:
"coder coder teaching sample problem" » "coder coder teaching sampling problem" (Expand search), "coder coder teaching complex problem" (Expand search), "coder coder teaching some problem" (Expand search), "coder code teaching sample problem" (Expand search), "coder poder teaching sample problem" (Expand search), "coder model teaching sample problem" (Expand search), "coder coder teaching scale problem" (Expand search), "coder decoder teaching sample problem" (Expand search), "code code teaching sample problem" (Expand search), "decoder codec teaching sample problem" (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 teaching sample problem") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder teaching sample problem\") OR (\"in python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder teaching sample problem ) OR ( in python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder teaching sample problem") OR ("in python python python programming"))*.