Perhaps you should try some spelling variations:
"dung cacu code snippets" » "dung cac code snippets", "dung cau code snippets", "dung cu code snippets", "dung cuacu code snippets", "dung caccu code snippets", "dung camcu code snippets", "dung cacu code slippers", "dung cacu core snippets"
"dung ca trong snippets" » "dung cay trong snippets", "dung cad trong snippets", "dung co trong snippets", "dung cua trong snippets", "dung cac trong snippets", "dung cam trong snippets", "dung ca trong slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets", "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 ca trong snippets") or ("dung cacu code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung ca trong snippets") OR ("dung cacu code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung ca trong snippets") or ("dung cacu code snippets"))) or ("locating bug code snippets"))*.