Perhaps you should try some spelling variations:
"co sach ty thuat xung dung trong marketing" » "co sach ty thuat xung dung tri marketing", "co sach ty thuat xung dung tvqg marketing", "co sach ty thuat dung dung trong marketing", "co sach ty thuat hung dung trong marketing", "co sach ty thuat song dung trong marketing", "co sach ty thuat cung dung trong marketing", "co sach ty thuat cuong dung trong marketing", "co sach ky thuat xung dung trong marketing", "co sach my thuat xung dung trong marketing", "co sach te thuat xung dung trong marketing", "bo sach ty thuat xung dung trong marketing", "cuon sach ty thuat xung dung trong marketing", "hoc sach ty thuat xung dung trong marketing", "co sach y thuat xung dung trong marketing", "co sach thu thuat xung dung trong marketing", "co xach tay thuat xung dung trong marketing"
"co sach tu thuat ung dung tai marketing" » "co sach tu thuat ung dung tri marketing", "co sach tu thuat ung dung tac marketing", "co sach tu thuat ung dung thi marketing", "co sach tu thuat dung dung tai marketing", "co sach tu thuat hung dung tai marketing", "co sach tu thuat song dung tai marketing", "co sach thu thuat ung dung tai marketing", "co sach te thuat ung dung tai marketing", "co sach tu thua ung dung tai marketing", "bo sach tu thuat ung dung tai marketing", "cuon sach tu thuat ung dung tai marketing", "hoc sach tu thuat ung dung tai marketing", "co cach tu thuat ung dung tai marketing", "co sach uu thuat ung dung tai marketing"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("co sach ty thuat xung dung trong marketing") or ("co sach tu thuat ung dung tai marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sach ty thuat xung dung trong marketing") OR ("co sach tu thuat ung dung tai marketing"))*.
• Removing quotes may allow a broader search: (( co sach ty thuat xung dung trong marketing ) or ( co sach tu thuat ung dung tai marketing ))*.