Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van cau toc snippets" » "van cau code snippets", "van dau toc snippets", "van hau toc snippets", "van chat toc snippets", "van cac toc snippets", "van cao toc snippets", "van cau hoc 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: (((("van cau toc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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