Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"khi toan cau snippets" » "khi toan code snippets", "chi toan cau snippets", "ke toan cau snippets", "bai toan cau snippets", "khi toan cao snippets", "khi toan ban snippets", "khi toan tap 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: (((("khi toan cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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