Perhaps you should try some spelling variations:
"trinh dong anh snippets" » "trinh duong anh snippets", "trinh dung anh snippets", "trinh cong anh snippets", "trinh hong anh snippets", "trinh dong thanh snippets", "trinh hoang anh snippets", "trinh dong anh 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 dong anh 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 dong anh snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh dong anh snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh dong anh snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.