Perhaps you should try some spelling variations:
"tran vat duoc snippets" » "tran van duoc snippets", "tran viet duoc snippets", "tran nhat duoc snippets", "tran dat duoc snippets", "tran luat duoc snippets", "tran xuat duoc snippets", "tran vat duoc slippers"
"python using a snippets" » "python using a 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.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("tran vat duoc snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran vat duoc snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran vat duoc snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran vat duoc snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.