Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dan bac tran snippets" » "dan ban tran snippets", "dan bao tran snippets", "dan boc tran snippets", "dan ba tran snippets", "van bac tran snippets", "dong bac tran snippets"

Try widening your search to All Fields.

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