Perhaps you should try some spelling variations:
"bo sach y thuat ung dung tvqg marketing" » "bo sach y thuat ung dung trong marketing", "bo sach y thuat ung dung tri marketing", "bo sach y thuat dung dung tvqg marketing", "bo sach y thuat hung dung tvqg marketing", "bo sach y thuat xung dung tvqg marketing", "bo sach y thuat ung dung tong marketing", "hoc sach y thuat ung dung tvqg marketing", "bo sach ky thuat ung dung tvqg marketing", "bo sach my thuat ung dung tvqg marketing", "bo sach kxy thuat ung dung tvqg marketing"
"co sach va thuc xung dung tai marketing" » "co sach va thuc xung dung tri marketing", "co sach va thuc xung dung tac marketing", "co sach va thuc xung dung thi marketing", "co sach va thuc dung dung tai marketing", "co sach va thuc cung dung tai marketing", "co sach va thuc vung dung tai marketing", "co sach va thuc cuong dung tai marketing", "cuon sach va thuc xung dung tai marketing", "hoc sach va thuc xung dung tai marketing", "co sach xa thuc xung dung tai marketing", "co sach ha thuc xung dung tai marketing", "co sach dao thuc xung dung tai marketing"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("co sach va thuc xung dung tai marketing") or ("bo sach y thuat ung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sach va thuc xung dung tai marketing") OR ("bo sach y thuat ung dung tvqg marketing"))*.
• Removing quotes may allow a broader search: (( co sach va thuc xung dung tai marketing ) or ( bo sach y thuat ung dung tvqg marketing ))*.