Perhaps you should try some spelling variations:
"coder coder sampling model coverage" » "coder under sampling model coverage" (Expand search), "coder over sampling model coverage" (Expand search), "coder core sampling model coverage" (Expand search), "coder coder sampling modeling coverage" (Expand search), "coder coder coupling model coverage" (Expand search), "coder coder sampling mixed coverage" (Expand search), "coder coder sampling models coverage" (Expand search), "coder coder sampling code coverage" (Expand search), "coder coder sampling model average" (Expand search), "coder decoder sampling model coverage" (Expand search), "code code sampling model coverage" (Expand search), "decoder codec sampling model coverage" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons 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 sampling model coverage") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder sampling model coverage\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder sampling model coverage ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder sampling model coverage") OR ("_ python python python programming"))*.