Perhaps you should try some spelling variations:
"trinh phan hoan snippets" » "trinh han hoan snippets", "trinh quan hoan snippets", "thanh phan hoan snippets", "trinh phap hoan snippets", "trinh phan hoa snippets", "trinh pham hoang snippets"
"dung cac code snippets" » "luong cac code snippets", "dung cho code snippets", "dung tai code snippets", "dung cac cong snippets", "dung cac co snippets", "dung cac che snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

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