Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets", "data using java slippers"
"dung thue dat snippets" » "dung thu dat snippets", "dung thuoc dat snippets", "dung thiet dat snippets", "dung thue da snippets", "dung thue luat snippets", "dung thue xuat snippets", "dung thue dat 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 thue dat snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung thue dat snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
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