Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"tran danh luan snippets" » "tran dinh luan snippets", "tran manh luan snippets", "tran dang luan snippets", "tran doanh luan snippets", "tran dan luan snippets", "tran tranh luan snippets", "tran danh luan slippers"
"dung va java snippets" » "dung java java snippets", "dung va java slippers"

Try widening your search to All Fields.

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