Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"dung kenh phan snippets" » "dung menh phan snippets", "dung nen phan snippets", "dung ninh phan snippets", "dung benh nhan snippets", "dung benh phau snippets", "dung ke phan snippets", "dung kenh phan slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung kenh phan snippets") or ("dung java java snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung kenh phan snippets") OR ("dung java java snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dung kenh phan snippets ) or ( dung java java snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung kenh phan snippets") or ("dung java java snippets"))) or ("locating bugs code snippets"))*.