Perhaps you should try some spelling variations:
"coder and coverage focusing functions" » "coder and coverage forcing functions" (Expand search), "coder and coverage focus functions" (Expand search), "coder and coverage processing functions" (Expand search), "coder and coverage using functions" (Expand search), "coder and coverage during functions" (Expand search), "coder and cover focusing functions" (Expand search), "code and coverage focusing functions" (Expand search), "codes and coverage focusing functions" (Expand search), "poder and coverage focusing functions" (Expand search)
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ python python python programming" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder and coverage focusing functions\") OR (\"in python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder and coverage focusing functions ) OR ( in python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder and coverage focusing functions") OR ("in python python python programming"))*.