Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"trinh ket doan snippets" » "tinh ket doan snippets", "trinh ke doan snippets", "trinh kiem doan snippets", "trinh ket hoa snippets", "trinh le doan snippets", "trinh ket van snippets"
"locating bug code snippets" » "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: (((("dung java java snippets") or ("trinh ket doan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trinh ket doan snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trinh ket doan snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trinh ket doan snippets"))) or ("locating bug code snippets"))*.