Perhaps you should try some spelling variations:
"hoc sach ky thuat dang dung trong marketing" » "hoc sach ky thuat dang dung tri marketing", "hoc sach ky thuat bang dung trong marketing", "hoc sach ky thuat dan dung trong marketing", "hoc sach ky thuat dong dung trong marketing", "hoc sach ky thuat dang hung trong marketing", "hoc sach ky thuat dang quang trong marketing", "hoc sinh ky thuat dang dung trong marketing", "hoc cac ky thuat dang dung trong marketing", "hoc anh ky thuat dang dung trong marketing", "hoc sac ky thuat dang dung trong marketing", "hoc sach y thuat dang dung trong marketing", "hoc sach ty thuat dang dung trong marketing"
"bo sach ki thuat dung ung tvqg marketing" » "bo sach ki thuat dung ung tri marketing", "bo sach ki thuat hung ung tvqg marketing", "bo sach ki thuat ung ung tvqg marketing", "bo sach ki thuat xung ung tvqg marketing", "bo sach ki thuat dung cong tvqg marketing", "co sach ki thuat dung ung tvqg marketing", "bo sach kinh thuat dung ung tvqg marketing", "bo sach bai thuat dung ung tvqg marketing", "bo sach kem thuat dung ung 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: (("hoc sach ky thuat dang dung trong marketing") or ("bo sach ki thuat dung ung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("hoc sach ky thuat dang dung trong marketing") OR ("bo sach ki thuat dung ung tvqg marketing")).
• Removing quotes may allow a broader search: (( hoc sach ky thuat dang dung trong marketing ) or ( bo sach ki thuat dung ung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("hoc sach ky thuat dang dung trong marketing") or ("bo sach ki thuat dung ung tvqg marketing"))*.