Perhaps you should try some spelling variations:
"dung huong code snippets" » "dung thuong code snippets", "dung phuong code snippets", "dong huong code snippets", "dung huong co snippets", "dung huong com snippets", "dung huong code slippers"
"trinh cau phan snippets" » "trinh chat phan snippets", "trinh chao phan snippets", "trinh tu phan snippets", "trinh chau phan snippets", "trinh cuu phan snippets", "trinh cac phan snippets", "trinh cau phan 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 cau phan snippets") or ("dung huong code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh cau phan snippets") OR ("dung huong code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trinh cau phan snippets") or ("dung huong code snippets"))) or ("locating bug code snippets"))*.