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