Perhaps you should try some spelling variations:
"dung dong het snippets" » "dung cong het snippets", "vung dong het snippets", "dung trong het snippets", "dung dong ket snippets", "dung hong het snippets", "dung dong hieu snippets", "dung dong het slippers"
"dung java java snippets" » "dung va java snippets", "dung java 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 dong het snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dong het snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dong het snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dong het snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.