Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dang hat do snippets" » "dang nhat do snippets", "dang phat do snippets", "dang vat do snippets", "dang hat doi snippets", "dang hat dao snippets", "dang hat de 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: (((("dang hat do snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang hat do snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang hat do snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang hat do snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.