Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"dau len vi snippets" » "dam len vi snippets", "dau tien vi snippets", "dau luan vi snippets", "dau lenh vi snippets", "dau men vi snippets", "dau den vi snippets", "dau len vi slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dau len vi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dau len vi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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