Perhaps you should try some spelling variations:
"bo sach ki thuat ung dung dong marketing" » "bo sach ki thuat ung dung trong marketing", "bo sach ki thuat ung dung tvqg marketing", "bo sach ki thuat dung dung dong marketing", "bo sach ki thuat hung dung dong marketing", "bo sach ki thuat xung dung dong marketing", "bo sach ki thuat ung dung cong marketing", "bo sach ki thuat ung vung dong marketing", "bo sach ky thuat ung dung dong marketing", "hoc sach ki thuat ung dung dong marketing", "bo sach kinh thuat ung dung dong marketing", "bo sach bai thuat ung dung dong marketing", "bo sach kem thuat ung dung dong marketing"
"co sach va tinh ung dung sai marketing" » "co sach va tinh ung dung tri marketing", "co sach va tinh ung dung tac marketing", "co sach va tinh ung dung van marketing", "co sach va tinh dung dung sai marketing", "co sach va trinh ung dung sai marketing", "co sach va tinh hung dung sai marketing", "co sach va tinh ung dung tai marketing", "co sach va tinh ung dung va marketing", "co sach va tinh ung dung dat marketing", "cuon sach va tinh ung dung sai marketing", "hoc sach va tinh ung dung sai marketing", "co sach xa tinh ung dung sai marketing", "co sach ha tinh ung dung sai marketing", "co sach dao tinh ung dung sai marketing", "co sach may tinh ung dung sai 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 va tinh ung dung sai marketing") OR ("bo sach ki thuat ung dung dong marketing"))~.
• Removing quotes may allow a broader search: (( co sach va tinh ung dung sai marketing ) or ( bo sach ki thuat ung dung dong marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("co sach va tinh ung dung sai marketing") or ("bo sach ki thuat ung dung dong marketing"))*.