Perhaps you should try some spelling variations:
"dung using data snippets" » "dung ung data snippets", "dung sinh data snippets", "dung uong data snippets", "dung using java snippets", "dung using sat snippets", "dung missing data snippets", "dung using data slippers"
"dung do sach snippets" » "dung doi sach snippets", "dung co sach snippets", "dung de sach snippets", "dung doc sach snippets", "dung do sanh snippets", "dung bo sach snippets", "dung do sach slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung do sach snippets") or ("dung using data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung do sach snippets") OR ("dung using data snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung do sach snippets ) or ( dung using data snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung do sach snippets") or ("dung using data snippets"))) or ("locating bug code snippets"))*.