Perhaps you should try some spelling variations:
"bo sac ky thuat xung dung tong marketing" » "bo sac ky thuat xung dung trong marketing", "bo sac ky thuat xung dung dong marketing", "bo sac ky thuat xung dung tvqg marketing", "bo sac ky thuat dung dung tong marketing", "bo sac ky thuat hung dung tong marketing", "bo sac ky thuat ung dung tong marketing", "bo sac ky thuat cung dung tong marketing", "bo sac ky thuat cuong dung tong marketing", "bo sac ky thuat xung dung thong marketing", "bo sac ky thuat xung dung cong marketing", "bo cac ky thuat xung dung tong marketing", "bo sai ky thuat xung dung tong marketing"
"bo sach ha tuc dung dung tai marketing" » "bo sach ha tuc dung dung tri marketing", "bo sach ha tuc dung dung tac marketing", "bo sach ha tuc dung dung thi marketing", "bo sach ha tuc ung dung tai marketing", "bo sach ha tuc dung ung tai marketing", "bo sach ha tuc dung dong tai marketing", "bo sach ha thuc dung dung tai marketing", "bo sach ha tac dung dung tai marketing", "bo sach ha duc dung dung tai marketing", "co sach ha tuc dung dung tai marketing", "hoc sach ha tuc dung dung tai marketing", "bo sach nha tuc dung dung tai marketing", "bo sach han tuc dung dung tai marketing", "bo sach xa tuc dung dung tai marketing", "bo sach va tuc dung dung tai marketing"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("bo sach ha tuc dung dung tai marketing") or ("bo sac ky thuat xung dung tong marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach ha tuc dung dung tai marketing") OR ("bo sac ky thuat xung dung tong marketing")).
• Removing quotes may allow a broader search: (( bo sach ha tuc dung dung tai marketing ) or ( bo sac ky thuat xung dung tong marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach ha tuc dung dung tai marketing") or ("bo sac ky thuat xung dung tong marketing"))*.