Perhaps you should try some spelling variations:
"trinh viet code snippets" » "ninh viet code snippets", "trinh vat code snippets", "trinh viet co snippets", "trinh viet some snippets", "trinh viet code slippers"
"dung trong dat snippets" » "dung trong dam snippets", "dung trong dan snippets", "dung trong dao snippets", "dung trong dat slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("trinh viet code snippets") or ("dung trong dat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh viet code snippets") OR ("dung trong dat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh viet code snippets ) or ( dung trong dat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh viet code snippets") or ("dung trong dat snippets"))) or ("locating bug code snippets"))*.