Perhaps you should try some spelling variations:
"sach danh dat snippets" » "sach tranh dat snippets", "sach dao dat snippets", "sach dung dat snippets", "sach danh bat snippets", "sach dinh dat snippets", "sach dan dat snippets", "sach danh dat slippers"
"dung java java snippets" » "dung va java snippets", "dung java java 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: (((("sach danh dat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach danh dat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach danh dat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach danh dat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.