Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"trong ban da snippets" » "trong san da snippets", "trong tan da snippets", "trong quan da snippets", "trong ban dan snippets", "trong ban dau snippets", "trong ban dac 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 ("trong ban da snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trong ban da snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trong ban da snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trong ban da snippets"))) or ("locating bug code snippets"))*.