Perhaps you should try some spelling variations:
"trinh chao phan snippets" » "trinh chat phan snippets", "trinh han phan snippets", "trinh co phan snippets", "trinh cho phan snippets", "trinh cao phan snippets", "trinh chau phan snippets", "trinh chao phan 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 chao phan 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 chao phan snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trinh chao phan snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))*.