Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"sang nhan cua snippets" » "sang than cua snippets", "bang nhan cua snippets", "song nhan cua snippets", "sang nhat cua snippets", "sang nhan luc snippets", "sang nhan su 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 ("sang nhan cua snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("sang nhan cua snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( sang nhan cua snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("sang nhan cua snippets"))) or ("locating bug code snippets"))*.