Perhaps you should try some spelling variations:
"bo sach ki thuat ung dung doi marketing" » "bo sach ki thuat ung dung dong marketing", "bo sach ki thuat ung dung tri marketing", "bo sach ki thuat ung dung thi marketing", "bo sach ki thuat dung dung doi marketing", "bo sach ki thuat hung dung doi marketing", "bo sach ki thuat xung dung doi marketing", "bo sach ky thuat ung dung doi marketing", "bo sach ki thuat ung huong doi marketing", "bo sach ki thuat ung dung tai marketing", "bo sach ki thuat ung dung co marketing", "hoc sach ki thuat ung dung doi marketing", "bo sach kinh thuat ung dung doi marketing", "bo sach bai thuat ung dung doi marketing", "bo sach kem thuat ung dung doi marketing"
"co sach do dinh ung dung sai marketing" » "co sach do dinh ung dung tri marketing", "co sach do dinh ung dung tac marketing", "co sach do dinh ung dung van marketing", "co sach do dinh hung dung sai marketing", "co sach do dinh dung dung sai marketing", "co sach do dinh sung dung sai marketing", "co sach do dinh ung dung tai marketing", "co sach do dinh ung dung va marketing", "co sach do dinh ung dung dat marketing", "cuon sach do dinh ung dung sai marketing", "hoc sach do dinh ung dung sai marketing", "co sach dao dinh ung dung sai marketing", "co sach doi dinh ung dung sai marketing", "co sach de dinh 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 do dinh ung dung sai marketing") OR ("bo sach ki thuat ung dung doi marketing"))~.
• Removing quotes may allow a broader search: (( co sach do dinh ung dung sai marketing ) or ( bo sach ki thuat ung dung doi marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("co sach do dinh ung dung sai marketing") or ("bo sach ki thuat ung dung doi marketing"))*.