Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"han tra chat snippets" » "han tra code snippets", "han tran chau snippets", "han tran nhat snippets", "han hoa chat snippets", "dan tra chat snippets", "van tra chat snippets", "thanh tra chat 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: (((("han tra chat snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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