Perhaps you should try some spelling variations:
"tran viet dat snippets" » "trien viet dat snippets", "gian viet dat snippets", "san viet dat snippets", "tran viec dat snippets", "tran viet da snippets", "tran viet dao snippets", "tran viet dat slippers"
"python using sat snippets" » "python using data snippets", "python using a snippets", "python using raw snippets", "python using sat 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: (((("tran viet dat snippets") or ("python using sat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran viet dat snippets") OR ("python using sat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran viet dat snippets ) or ( python using sat snippets ))) or ( locating bug code snippets )).
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