Perhaps you should try some spelling variations:
"trinh hang vat snippets" » "trinh han vat snippets", "tranh hang vat snippets", "trinh hanh vat snippets", "trinh hang va snippets", "trinh dang vat snippets", "trinh bang vat snippets", "trinh hang vat 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 hang vat 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 hang vat snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh hang vat snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh hang vat snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.