Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung san chen snippets" » "dong san chen snippets", "dung sai chen snippets", "dung luan chen snippets", "dung yan chen snippets", "dung van chien snippets", "dung san chang snippets"
"locating bug code snippets" » "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 san chen snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
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