Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"ban nhan hoa snippets" » "ban nhan code snippets", "ban than hoa snippets", "van nhan hoa snippets", "ban thanh hoa snippets", "ban nhan khoa snippets", "ban phan hoa 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: (((("ban nhan hoa snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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