Perhaps you should try some spelling variations:
"trinh chat phep snippets" » "tinh chat phep snippets", "trinh luat phep snippets", "trinh han phep snippets", "trinh nhat phep snippets", "trinh chap phap snippets", "trinh chat hop snippets", "trinh chat phep 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 phep 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 chat phep snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trinh chat phep snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))*.