Perhaps you should try some spelling variations:
"trung dung phan snippets" » "ung dung phan snippets", "trung uong phan snippets", "trinh dung phan snippets", "trung dung nhan snippets", "trung dung luan snippets", "trung dung ha snippets", "trung dung phan 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: (((("trung dung phan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trung dung phan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trung dung phan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.