Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"thong qua dung snippets" » "thong quan dung snippets", "thong cua dung snippets", "thong tu dung snippets", "thong quang dung snippets", "thong su dung snippets", "thong qua song snippets", "thong qua 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: (((("dung java java snippets") or ("thong qua dung snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("thong qua dung snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("thong qua dung snippets"))) or ("locating bug code snippets"))*.