Perhaps you should try some spelling variations:
"co sach ky thuat ung dung trong marketing" » "co sach ky thuat ung dung tri marketing", "co sach ky thuat dung dung trong marketing", "co sach ky thuat hung dung trong marketing", "co sach ky thuat xung dung trong marketing", "bo sach ky thuat ung dung trong marketing", "cuon sach ky thuat ung dung trong marketing", "hoc sach ky thuat ung dung trong marketing", "co sac ky thuat ung dung trong marketing", "co sach y thuat ung dung trong marketing", "co sach ty thuat ung dung trong marketing"
"co sach va thuat song dung tvqg marketing" » "co sach va thuat song dung tri marketing", "co sach va thuat song duong tvqg marketing", "co sach va thuat cong dung tvqg marketing", "co sach va thuat song dong tvqg marketing", "co sach va thuat song dung tong marketing", "co sach ki thuat song dung tvqg marketing", "co sach va thuc song dung tvqg marketing", "co sach va thiet song dung tvqg marketing", "bo sach va thuat song dung tvqg marketing", "cuon sach va thuat song dung tvqg marketing", "hoc sach va thuat song dung tvqg marketing", "co sach xa thuat song dung tvqg marketing", "co sach ha thuat song dung tvqg marketing", "co sach dao thuat song dung tvqg 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 ky thuat ung dung trong marketing") or ("co sach va thuat song dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sach ky thuat ung dung trong marketing") OR ("co sach va thuat song dung tvqg marketing"))*.
• Removing quotes may allow a broader search: (( co sach ky thuat ung dung trong marketing ) or ( co sach va thuat song dung tvqg marketing ))*.