Perhaps you should try some spelling variations:
"coder coder sampling via problem" » "coder under sampling via problem" (Expand search), "coder over sampling via problem" (Expand search), "coder core sampling via problem" (Expand search), "coder coder sampling bias problem" (Expand search), "coder coder sampling in problem" (Expand search), "coder coder sampling grid problem" (Expand search), "coder decoder sampling via problem" (Expand search), "code code sampling via problem" (Expand search), "decoder codec sampling via problem" (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 via problem") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder sampling via problem\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder sampling via problem ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder sampling via problem") OR ("_ python python python programming"))*.