Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dan chi toan snippets" » "dan chi code snippets", "dan khi toan snippets", "dan chi thanh snippets", "dan bai toan snippets", "danh chi toan snippets", "dan thi toan snippets", "van chi toan 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: (((("dan chi toan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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