Perhaps you should try some spelling variations:
"dung hung anh snippets" » "dung chung anh snippets", "dung nhung anh snippets", "dung huong anh snippets", "dung hung manh snippets", "dung hong anh snippets", "dung phuong anh snippets", "dung hung anh 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 hung anh 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 hung anh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung hung anh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.