Perhaps you should try some spelling variations:
"bo sach my thuat ung dung trong marketing" » "bo sach my thuat ung dung tvqg marketing", "bo sach my thuat dung dung trong marketing", "bo sach my thuat hung dung trong marketing", "bo sach my thuat xung dung trong marketing", "bo sach ky thuat ung dung trong marketing", "bo sach ki thuat ung dung trong marketing", "bo sach va thuat ung dung trong marketing", "co sach my thuat ung dung trong marketing", "bo sach ty thuat ung dung trong marketing", "bo sach mau thuat ung dung trong marketing", "bo sach moi thuat ung dung trong marketing", "bo sach mly thuat ung dung trong marketing", "bo sach mky thuat ung dung trong marketing", "bo sach my thucat ung dung trong marketing"
"hoc sach y thu cong dong tri marketing" » "hoc sach y thu cong dong tvqg marketing", "hoc sach y thu cong dong _ marketing", "hoc sach y thu cong dong cuu marketing", "hoc sinh y thu cong dong tri marketing", "hoc cac y thu cong dong tri marketing", "hoc anh y thu cong dong tri marketing", "hoc sach y thu cong dong tai marketing", "hoc sach y thu cong dung tri marketing", "hoc sach y thu cong dong thi marketing", "hoc sach ly thu cong dong tri marketing", "hoc sach ky thu cong dong tri marketing", "hoc sach y thuc cong dong tri 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 my thuat ung dung trong marketing") OR ("hoc sach y thu cong dong tri marketing"))~.
• Removing quotes may allow a broader search: (( bo sach my thuat ung dung trong marketing ) or ( hoc sach y thu cong dong tri marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("bo sach my thuat ung dung trong marketing") or ("hoc sach y thu cong dong tri marketing"))*.