Perhaps you should try some spelling variations:
"dung dung lam snippets" » "duong dung lam snippets", "ung dung lam snippets", "dung dong lam snippets", "dung dung luan snippets", "dung dung tai snippets", "dung dung dat snippets", "dung dung lam slippers"
"dung ung java snippets" » "dung trung java snippets", "dung quang java snippets", "dung chung java snippets", "dung using java snippets", "dung ngu java snippets", "dung ung va snippets", "dung ung 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 dung lam snippets") or ("dung ung java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dung lam snippets") OR ("dung ung java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung dung lam snippets") or ("dung ung java snippets"))) or ("locating bug code snippets"))*.