Perhaps you should try some spelling variations:
"dung cua trong snippets" » "dung cua truong snippets", "dung cua trung snippets", "dung qua trong snippets", "dung luan trong snippets", "dung cho trong snippets", "dung cua trong slippers"
"dung cauc code snippets" » "dung cac code snippets", "dung cau code snippets", "dung cu code snippets", "dung cauc code slippers", "dung cauc core snippets"
"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 cua trong snippets") or ("dung cauc code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cua trong snippets") OR ("dung cauc code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung cua trong snippets") or ("dung cauc code snippets"))) or ("locating bug code snippets"))*.