Perhaps you should try some spelling variations:
"co sac ky thuat xung dung trong marketing" » "co sac ky thuat xung dung tri marketing", "co sac ky thuat dung dung trong marketing", "co sac ky thuat ung dung trong marketing", "co sac ky thuat song dung trong marketing", "co sac ky thuat cung dung trong marketing", "co sach ky thuat xung dung trong marketing", "co cac ky thuat xung dung trong marketing", "cao sach ky thuat xung dung trong marketing", "co sai ky thuat xung dung trong marketing"
"hoc sach kem thuat hung dung tvqg marketing" » "hoc sach kem thuat hung dung tri marketing", "hoc sach kem thuat dung dung tvqg marketing", "hoc sach kem thuat ung dung tvqg marketing", "hoc sach kem thuat chuong dung tvqg marketing", "hoc sach kiem thuat hung dung tvqg marketing", "hoc sach ki thuat hung dung tvqg marketing", "hoc sach ve thuat hung dung tvqg marketing", "hoc sach kem thuat nhung dung tvqg marketing", "hoc sach kem thuat phung dung tvqg marketing", "hoc sach kem thuat hung dung tong marketing", "hoc sinh kem thuat hung dung tvqg marketing", "hoc cac kem thuat hung dung tvqg marketing", "hoc anh kem thuat hung dung tvqg marketing", "hoc hanh kem thuat hung 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 sac ky thuat xung dung trong marketing") or ("hoc sach kem thuat hung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sac ky thuat xung dung trong marketing") OR ("hoc sach kem thuat hung dung tvqg marketing")).
• Removing quotes may allow a broader search: (( co sac ky thuat xung dung trong marketing ) or ( hoc sach kem thuat hung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("co sac ky thuat xung dung trong marketing") or ("hoc sach kem thuat hung dung tvqg marketing"))*.