Perhaps you should try some spelling variations:
"trinh chat code snippets" » "tinh chat code snippets", "trinh luat code snippets", "trinh han code snippets", "trinh chat co snippets", "trinh chat cong snippets", "trinh chat code slippers"
"dung quat data snippets" » "dung quan data snippets", "dung qua data snippets", "dung luat data snippets", "dung luat dat snippets", "dung qua dat snippets", "dung tuat dat snippets", "dung quat data 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 code snippets") or ("dung quat data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh chat code snippets") OR ("dung quat data snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trinh chat code snippets") or ("dung quat data snippets"))) or ("locating bug code snippets"))*.