Perhaps you should try some spelling variations:
"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"
"trinh te doanh snippets" » "trinh tu doanh snippets", "trinh he doanh snippets", "trinh ve doanh snippets", "trinh te danh snippets", "trinh de doanh snippets", "trinh ty doanh snippets", "trinh te doanh 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 te 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 te 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 te doanh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))*.