Perhaps you should try some spelling variations:
"tranh trong duan snippets" » "tran trong duan snippets", "trinh trong duan snippets", "anh trong duan snippets", "tranh trong quan snippets", "tranh trong dan snippets", "tranh trong tuan snippets", "tranh trong duan slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers", "dung bug core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("tranh trong duan snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tranh trong duan snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("tranh trong duan snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.