Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"tu sach ban snippets" » "tu sach bai snippets", "tu sach han snippets", "tu sach bac snippets", "thu sach ban snippets", "su sach ban snippets", "te sach ban snippets", "tu sach ban 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: (((("tu sach ban snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tu sach ban snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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