Perhaps you should try some spelling variations:
"cong toan trinh snippets" » "cong thanh trinh snippets", "cong trang trinh snippets", "cong toan tin snippets", "cong tan trinh snippets", "cong hoan trinh snippets", "cong tuan trinh snippets", "cong toan trinh 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"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("cong toan trinh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong toan trinh snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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