Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dun nang cai snippets" » "dung nang cai snippets", "den nang cai snippets", "luan nang cai snippets", "dun nang cao snippets", "dun nang tai snippets", "dun nang cap 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 cai 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 cai snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dun nang cai snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dun nang cai snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.