Perhaps you should try some spelling variations:
"coder decoder sampling array problem" » "coder under sampling array problem" (Expand search), "coder over sampling array problem" (Expand search), "coder order sampling array problem" (Expand search), "coder decoder sampling area problem" (Expand search), "coder decoder sampling areas problem" (Expand search), "coder decoder sampling error problem" (Expand search), "encoder decoder sampling array problem" (Expand search), "coder decoder sampling leray problem" (Expand search), "coder decoder sampling parity 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 decoder sampling array problem") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder sampling array problem\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder sampling array problem ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder sampling array problem") OR ("on python python python programming"))*.