Perhaps you should try some spelling variations:
"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"
"dung ha phi snippets" » "dung va phi snippets", "dung he phi snippets", "dung khoa phi snippets", "dung hoa phi snippets", "dung ha thi snippets", "dung ha nhi snippets", "dung ha phi 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 ung java snippets") or ("dung ha phi snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung ung java snippets") OR ("dung ha phi snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung ung java snippets") or ("dung ha phi snippets"))) or ("locating bug code snippets"))*.