Perhaps you should try some spelling variations:
"dung cua code snippets" » "dung luan code snippets", "dung cho code snippets", "dung cua cong snippets", "dung cua co snippets", "dung cfd code snippets", "dung cua code slippers"
"dung tan dat snippets" » "dung toan dat snippets", "duong tan dat snippets", "dung tai dat snippets", "dung dan dat snippets", "dung ban dat snippets", "dung tan dac snippets", "dung tan dat 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 cua code snippets") or ("dung tan dat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cua code snippets") OR ("dung tan dat snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung cua code snippets") or ("dung tan dat snippets"))) or ("locating bug code snippets"))*.