Perhaps you should try some spelling variations:
"bo sach ty thuat xung dung trong marketing" » "bo sach ty thuat xung dung tri marketing", "bo sach ty thuat hung dung trong marketing", "bo sach ty thuat ung dung trong marketing", "bo sach ty thuat song dung trong marketing", "bo sach ty thuat dung dung trong marketing", "bo sach ty thuat cung dung trong marketing", "bo sach ky thuat xung dung trong marketing", "bo sach te thuat xung dung trong marketing", "bo sach thu thuat xung dung trong marketing", "co sach ty thuat xung dung trong marketing", "hoc sach ty thuat xung dung trong marketing", "bo sach y thuat xung dung trong marketing", "bo sach tu thuat xung dung trong marketing"
"bo sach my thuat dung ung tvqg marketing" » "bo sach my thuat dung ung tri marketing", "bo sach my thuat hung ung tvqg marketing", "bo sach my thuat ung ung tvqg marketing", "bo sach my thuat song ung tvqg marketing", "bo sach ky thuat dung ung tvqg marketing", "bo sach ki thuat dung ung tvqg marketing", "bo sach va thuat dung ung tvqg marketing", "bo sach my thuat dung cong tvqg marketing", "co sach my thuat dung ung tvqg marketing", "hoc sach my thuat dung ung tvqg marketing", "bo sach y thuat dung ung tvqg marketing", "bo sach mau thuat dung ung tvqg marketing", "bo sach moi thuat dung ung 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 my thuat dung ung tvqg marketing") OR ("bo sach ty thuat xung dung trong marketing"))~.
• Removing quotes may allow a broader search: (( bo sach my thuat dung ung tvqg marketing ) or ( bo sach ty thuat xung dung trong marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("bo sach my thuat dung ung tvqg marketing") or ("bo sach ty thuat xung dung trong marketing"))*.