Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"cac cau sach snippets" » "cac cao sach snippets", "cac hau sach snippets", "cac rau sach snippets", "cac mau sach snippets", "bac cau sach snippets", "ca cau sach snippets"

Try widening your search to All Fields.

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