Perhaps you should try some spelling variations:
"trinh cho doanh snippets" » "trinh chao doanh snippets", "trinh co doanh snippets", "trinh chat doanh snippets", "trinh hoa doanh snippets", "trinh cho thanh snippets", "trinh cho doanh slippers"
"dung dung code snippets" » "duong dung code snippets", "ung dung code snippets", "dung ung code snippets", "dung dung cong snippets", "dung dung co snippets", "dung dung de snippets", "dung dung code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("trinh cho doanh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh cho doanh snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trinh cho doanh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))*.