Perhaps you should try some spelling variations:
"hoc cac ki thuat hung dung tri marketing" » "hoc cac ki thuat hung dung trong marketing", "hoc cac ki thuat hung dung tvqg marketing", "hoc cac ki thuat hung dung _ marketing", "hoc cac ki thuat dung dung tri marketing", "hoc cac ki thuat ung dung tri marketing", "hoc cac ki thuat chuong dung tri marketing", "hoc cac ki thuat nhung dung tri marketing", "hoc cac ki thuat phung dung tri marketing", "hoc cac ky thuat hung dung tri marketing", "hoc cac ki thuat hung dung tai marketing", "hoc cac ki thuat hung dung tren marketing", "hoc cac ki thuat hung dung sai marketing", "hoc cao ki thuat hung dung tri marketing", "hoc cac khi thuat hung dung tri marketing", "hoc cac vi thuat hung dung tri marketing"
"bo sach y thuat xung dung tri marketing" » "bo sach y thuat xung dung trong marketing", "bo sach y thuat xung dung tvqg marketing", "bo sach y thuat xung dung _ marketing", "bo sach y thuat dung dung tri marketing", "bo sach y thuat ung dung tri marketing", "bo sach y thuat song dung tri marketing", "bo sach y thuat cung dung tri marketing", "bo sach y thuat xung dung tai marketing", "bo sach y thuat xung dung tren marketing", "bo sach y thuat xung dung sai marketing", "co sach y thuat xung dung tri marketing", "hoc sach y thuat xung dung tri marketing", "bo sach ky thuat xung dung tri marketing", "bo sach my thuat xung dung tri marketing", "bo sach kxy thuat xung dung 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: (("hoc cac ki thuat hung dung tri marketing") OR ("bo sach y thuat xung dung tri marketing"))~.
• Removing quotes may allow a broader search: (( hoc cac ki thuat hung dung tri marketing ) or ( bo sach y thuat xung dung tri marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("hoc cac ki thuat hung dung tri marketing") or ("bo sach y thuat xung dung tri marketing"))*.