Perhaps you should try some spelling variations:
"ban sach code snippets" » "ban sach che snippets", "ban sach de snippets", "ban sac code snippets", "ban mach code snippets", "ngan sach code snippets", "ban sach code slippers"
"dung dung code snippets" » "duong dung code snippets", "ung dung code snippets", "dung ung code snippets", "dung dung cong snippets", "dung dung co snippets", "dung dung de snippets", "dung dung code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("ban sach code snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban sach code snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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