Perhaps you should try some spelling variations:
"bo sach ki thuat ung dung trong marketing" » "bo sach ki thuat ung dung tri marketing", "bo sach ki thuat dung dung trong marketing", "bo sach ki thuat xung dung trong marketing", "bo sach ki thuat song dung trong marketing", "bo sach ky thuat ung dung trong marketing", "co sach ki thuat ung dung trong marketing", "bo sach kinh thuat ung dung trong marketing", "bo sach bai thuat ung dung trong marketing", "bo sach kem thuat ung dung trong marketing"
"hoc sach ki thuat hung dung tvqg marketing" » "hoc sach ki thuat hung dung tri marketing", "hoc sach ki thuat dung dung tvqg marketing", "hoc sach ki thuat xung dung tvqg marketing", "hoc sach ki thuat chuong dung tvqg marketing", "hoc sach ki thuat nhung dung tvqg marketing", "hoc sach ki thuat phung dung tvqg marketing", "hoc sach ki thuat hung dung tong marketing", "hoc sach ky thuat hung dung tvqg marketing", "hoc sinh ki thuat hung dung tvqg marketing", "hoc cac ki thuat hung dung tvqg marketing", "hoc anh ki thuat hung dung tvqg marketing", "hoc sach kinh thuat hung dung tvqg marketing", "hoc sach bai thuat hung dung tvqg marketing", "hoc sach kem thuat hung 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: (("bo sach ki thuat ung dung trong marketing") OR ("hoc sach ki thuat hung dung tvqg marketing"))~.
• Removing quotes may allow a broader search: (( bo sach ki thuat ung dung trong marketing ) or ( hoc sach ki thuat hung dung tvqg marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("bo sach ki thuat ung dung trong marketing") or ("hoc sach ki thuat hung dung tvqg marketing"))*.