Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets", "data using java slippers"
"dung quang dam snippets" » "dang quang dam snippets", "luong quang dam snippets", "dung luan dam snippets", "dung quang nam snippets", "dung quang lam snippets", "dung quang dai snippets", "dung quang dam 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: (((("data using java snippets") or ("dung quang dam snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("data using java snippets") OR ("dung quang dam snippets"))) OR ("locating bug code snippets")).
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