Perhaps you should try some spelling variations:
"dun nang nghe snippets" » "dun lang nghe snippets", "dun cong nghe snippets", "dun van nghe snippets", "dung nang nghe snippets", "den nang nghe snippets", "luan nang nghe snippets"
"dung java java snippets" » "dung va java 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: (((("dun nang nghe snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dun nang nghe snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dun nang nghe snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dun nang nghe snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.