Perhaps you should try some spelling variations:
"trinh cua ty snippets" » "tinh cua ty snippets", "trinh luat ty snippets", "trinh quan ty snippets", "trinh cua ky snippets", "trinh cua te snippets", "trinh cua tu snippets", "trinh cua ty 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 cua ty 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 cua ty snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh cua ty snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh cua ty snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.