Perhaps you should try some spelling variations:
"trinh nhat trong snippets" » "trinh chat trong snippets", "trinh nha trong snippets", "trinh nhap trong snippets", "trinh nhat trang snippets", "trinh nhan trong snippets", "trinh nhat trong slippers"
"dung cac code snippets" » "luong cac code snippets", "dung cho code snippets", "dung tai code snippets", "dung cac cong snippets", "dung cac co snippets", "dung cac che snippets", "dung cac 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: (((("trinh nhat trong snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh nhat trong snippets") OR ("dung cac code snippets"))) OR ("locating bug code snippets")).
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