Perhaps you should try some spelling variations:
"trinh tho duc snippets" » "trinh thao duc snippets", "trinh theo duc snippets", "trinh thoi duc snippets", "trinh ho duc snippets", "trinh thu duc snippets", "trinh tao duoc snippets", "trinh tho duc 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 tho duc 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 tho duc snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trinh tho duc snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.