Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"phan dan tra snippets" » "phan dang tra snippets", "phan dau tra snippets", "nhan dan tra snippets", "phan dan ta snippets", "phan van tra snippets", "phan dang tran snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("phan dan tra snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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