Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung tin doc snippets" » "dong tin doc snippets", "luong tin doc snippets", "dung tren doc snippets", "dung tin hoc snippets", "dung tin don snippets", "dung trinh doc 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 tin doc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tin doc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tin doc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tin doc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.