Perhaps you should try some spelling variations:
"trinh dan trong snippets" » "trinh han trong snippets", "trinh van trong snippets", "trinh san trong snippets", "trinh ban trong snippets", "trinh dat trong snippets", "trinh dao trong snippets", "trinh dan trong 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: (((("trinh dan trong snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh dan trong snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh dan trong snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh dan trong snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.