Perhaps you should try some spelling variations:
"viet dung code snippets" » "viet dung cong snippets", "viet dung co snippets", "viet dung de snippets", "viet hung code snippets", "viet huong code snippets", "viet trung code snippets", "viet dung code slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using a snippets") or ("viet dung code snippets"))) or ("locating bug code snippets"))~.
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