Perhaps you should try some spelling variations:
"trinh chat nhan snippets" » "tinh chat nhan snippets", "trinh luat nhan snippets", "trinh han nhan snippets", "trinh hat nhan snippets", "trinh chan nhan snippets", "trinh chau nhan snippets", "trinh chat nhan 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: (((("trinh chat nhan snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
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