Perhaps you should try some spelling variations:
"tran dong trinh snippets" » "tran cong trinh snippets", "tran dong tinh snippets", "tran dong tranh snippets", "tran dang trinh snippets", "tran hong trinh snippets", "tran dung trinh snippets", "tran dong trinh 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: (((("tran dong trinh snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran dong trinh snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran dong trinh snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran dong trinh snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.