Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong hang hoa snippets" » "dong bang hoa snippets", "dong hung hoa snippets", "dong nang hoa snippets", "dong hang khoa snippets", "dong thanh hoa snippets", "dong hang va 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 ("dong hang hoa snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dong hang hoa snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dong hang hoa snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dong hang hoa snippets"))) or ("locating bug code snippets"))*.