Perhaps you should try some spelling variations:
"dung ung code snippets" » "dung trung code snippets", "dung quang code snippets", "dung chung code snippets", "dung ung co snippets", "dung ung code slippers"
"dung cau duoc snippets" » "dung chau duoc snippets", "dung cu duoc snippets", "dung cac duoc snippets", "dung cuu duoc snippets", "dung cau duong snippets", "dung chua duoc snippets", "dung cau duoc 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: (((("dung ung code snippets") or ("dung cau duoc snippets"))) or ("locating bug code snippets"))~.
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• Adding a wildcard symbol may retrieve word variants: (((("dung ung code snippets") or ("dung cau duoc snippets"))) or ("locating bug code snippets"))*.