Perhaps you should try some spelling variations:
"dung nuoc trong snippets" » "dung nuoi trong snippets", "dung thuoc trong snippets", "dung hoc trong snippets", "dang nuoc trong snippets", "dung quoc trong snippets", "dung nuoc trong slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung nuoc trong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung nuoc trong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung nuoc trong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.