Perhaps you should try some spelling variations:
"co sach dau thuat phung dung trong marketing" » "co sach dau thuat phung dung tri marketing", "co sach dau thuat hung dung trong marketing", "co sach dau thuat chung dung trong marketing", "co sach dau thuat nhung dung trong marketing", "co sach dau thuat phuong dung trong marketing", "co sach dau thuat phung dang trong marketing", "co sach phau thuat phung dung trong marketing", "co sach dau thau phung dung trong marketing", "co sach thu thuat phung dung trong marketing", "co sach dao thuat phung dung trong marketing", "co sach dat thuat phung dung trong marketing", "co sach mau thuat phung dung trong marketing", "cuon sach dau thuat phung dung trong marketing", "hoc sach dau thuat phung dung trong marketing"
"bo sach y thuat ung dung tvqg 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"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sach dau thuat phung dung trong marketing") OR ("bo sach y thuat ung dung tvqg marketing"))~.
• Removing quotes may allow a broader search: (( co sach dau thuat phung dung trong marketing ) or ( bo sach y thuat ung dung tvqg marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("co sach dau thuat phung dung trong marketing") or ("bo sach y thuat ung dung tvqg marketing"))*.