Perhaps you should try some spelling variations:
"dung using java snippets" » "dung ung java snippets", "dung sinh java snippets", "dung uong java snippets", "dung using data snippets", "dung using java slippers"
"dong san dung snippets" » "cong san dung snippets", "dong bang dung snippets", "dong von dung snippets", "dong van dung snippets", "dong dan dung snippets", "dong lan dung snippets", "dong san dung 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: (((("dong san dung snippets") or ("dung using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong san dung snippets") OR ("dung using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dong san dung snippets") or ("dung using java snippets"))) or ("locating bug code snippets"))*.