Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"duc tong cuc snippets" » "duc thong cuc snippets", "duc trong cuc snippets", "duc ton cuc snippets", "duc trong cuoc snippets", "duc thong cua snippets", "duc cong chuc 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 ("duc tong cuc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("duc tong cuc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( duc tong cuc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("duc tong cuc snippets"))) or ("locating bug code snippets"))*.