Perhaps you should try some spelling variations:
"trinh dat thien snippets" » "trinh vat thien snippets", "trinh da thien snippets", "trinh dan thien snippets", "trinh dat tien snippets", "trinh mat thien snippets", "trinh doan thien snippets", "trinh dat thien 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"

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("trinh dat thien 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 dat thien snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh dat thien snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh dat thien snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.