Perhaps you should try some spelling variations:
"sach luan trinh snippets" » "sach xuan trinh snippets", "sach luan tinh snippets", "sach luan tranh snippets", "sach luyen trinh snippets", "sach han trinh snippets", "san luan trinh snippets", "sach luan trinh 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"

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: (((("sach luan trinh 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 luan trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach luan trinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach luan trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.