Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"den lam toc snippets" » "den lam code snippets", "de lam toc snippets", "den cam toc snippets", "den lay toc snippets", "den lam thuoc snippets", "den lam truoc snippets", "den lam duoc 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: (((("python using java snippets") or ("den lam toc snippets"))) or ("locating bug core snippets"))~.
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