Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"chen thu tin snippets" » "chuyen thu tin snippets", "chen yu tin snippets", "tien thu tin snippets", "chen thuc tin snippets", "chen tu tin snippets", "chen thu hien snippets", "chen thu tin 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: (((("chen thu tin snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chen thu tin snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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