Perhaps you should try some spelling variations:
"tang vat duoc snippets" » "tang van duoc snippets", "dang vat duoc snippets", "bang vat duoc snippets", "tang dat duoc snippets", "tang luat duoc snippets", "tang xuat duoc snippets", "tang 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: (((("tang 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: (((("tang vat duoc snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tang vat duoc snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang vat duoc snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.