Perhaps you should try some spelling variations:
"dung cho phan snippets" » "dung co phan snippets", "dung hoc phan snippets", "dung hoa phan snippets", "dung cho phan slippers"
"trinh tu code snippets" » "trinh ky code snippets", "trinh do code snippets", "trinh tu code 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: (((("dung cho phan snippets") or ("trinh tu code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cho phan snippets") OR ("trinh tu code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cho phan snippets ) or ( trinh tu code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cho phan snippets") or ("trinh tu code snippets"))) or ("locating bug code snippets"))*.