Perhaps you should try some spelling variations:
"dung using data snippets" » "dung ung data snippets", "dung sinh data snippets", "dung uong data snippets", "dung using java snippets", "dung using sat snippets", "dung missing data snippets", "dung using data slippers"
"dung cac hai snippets" » "luong cac hai snippets", "dung cho hai snippets", "dung tai hai snippets", "dung cuc hai snippets", "dung cac bai snippets", "dung cac dai snippets", "dung cac hai 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 using data snippets") or ("dung cac hai snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung using data snippets") OR ("dung cac hai snippets"))) OR ("locating bug code snippets")).
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