Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"che viet cau snippets" » "che viet code snippets", "chu viet cau snippets", "nghe viet cau snippets", "thue viet cau snippets", "che viet chau snippets", "che viet ca snippets", "che viet chu 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: (((("che viet cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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