Perhaps you should try some spelling variations:
"coder positional errors in program" » "coder positioning errors in program" (Expand search), "coder positioning error in program" (Expand search), "codon positional errors in program" (Expand search), "code position errors in program" (Expand search), "does positional errors in program" (Expand search), "coder positional errors in programs" (Expand search)
"based program python python programming" » "based program patos python programming" (Expand search), "based program paths python programming" (Expand search), "based program path python programming" (Expand search), "based program pythons python programming" (Expand search), "based program piton python programming" (Expand search), "based program pitons python programming" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder positional errors in program\") OR (\"based program python python programming\"))~".
• Removing quotes may allow a broader search: (( coder positional errors in program ) OR ( based program python python programming ))~.
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