Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"do sang sach snippets" » "do mang sach snippets", "do sang tac snippets", "do ban sach snippets", "do sanh sach snippets", "do dang sach snippets", "do tang sach snippets", "do sang sach 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: (((("do sang sach snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do sang sach snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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