Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"sach ban cau snippets" » "sach ban code snippets", "sach bai cau snippets", "sach han cau snippets", "sach bac cau snippets", "sach bang cau snippets", "sach ban can snippets", "sach van cau snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("sach ban cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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