Perhaps you should try some spelling variations:
"dung hung code snippets" » "dung chung code snippets", "dung nhung code snippets", "dung huong code snippets", "dung hung code slippers"
"tang van code snippets" » "dang van code snippets", "hoang van code snippets", "trong van code snippets", "tang van de snippets", "tang van hoe snippets", "tang van cong snippets", "tang van code 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: (((("dung hung code snippets") or ("tang van code snippets"))) or ("locating bug code snippets"))~.
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