Perhaps you should try some spelling variations:
"hoc sach ki thuat hung dung chien marketing" » "hoc sach ki thuat hung dung thien marketing", "hoc sach ki thuat hung dung thi marketing", "hoc sach ki thuat dung dung chien marketing", "hoc sach ki thuat xung dung chien marketing", "hoc sach ki thuat chuong dung chien marketing", "hoc sach ki thuat nhung dung chien marketing", "hoc sach ki thuat phung dung chien marketing", "hoc sinh ki thuat hung dung chien marketing", "hoc cac ki thuat hung dung chien marketing", "hoc anh ki thuat hung dung chien marketing", "hoc sach kinh thuat hung dung chien marketing", "hoc sach bai thuat hung dung chien marketing", "hoc sach kem thuat hung dung chien marketing"
"co sach ky thuat ung dung tvqg marketing" » "co sach ky thuat ung dung trong marketing", "co sach ky thuat ung dung tri marketing", "co sach ky thuat dung dung tvqg marketing", "co sach ky thuat xung dung tvqg marketing", "co sach ky thuat song dung tvqg marketing", "co sach ky thuat ung dung tong marketing", "bo sach ky thuat ung dung tvqg marketing", "cuon sach ky thuat ung dung tvqg marketing", "co sac ky thuat ung dung tvqg marketing", "co sach y thuat ung dung tvqg marketing", "co sach ty thuat ung dung 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: (("hoc sach ki thuat hung dung chien marketing") OR ("co sach ky thuat ung dung tvqg marketing"))~.
• Removing quotes may allow a broader search: (( hoc sach ki thuat hung dung chien marketing ) or ( co sach ky thuat ung dung tvqg marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("hoc sach ki thuat hung dung chien marketing") or ("co sach ky thuat ung dung tvqg marketing"))*.