Perhaps you should try some spelling variations:
"co sach ky thuat hung dung trong marketing" » "co sach ky thuat hung dung tri marketing", "co sach ky thuat dung dung trong marketing", "co sach ky thuat ung dung trong marketing", "co sach ky thuat chuong dung trong marketing", "co sach ky thuat nhung dung trong marketing", "co sach ky thuat phung dung trong marketing", "bo sach ky thuat hung dung trong marketing", "cuon sach ky thuat hung dung trong marketing", "hoc sach ky thuat hung dung trong marketing", "co sac ky thuat hung dung trong marketing", "co sach y thuat hung dung trong marketing", "co sach ty thuat hung dung trong marketing"
"co sach nha thuat xung dung tvqg marketing" » "co sach nha thuat xung dung tri marketing", "co sach nha thuat dung dung tvqg marketing", "co sach nha thuat ung dung tvqg marketing", "co sach nha thuat song dung tvqg marketing", "co sach nghe thuat xung dung tvqg marketing", "co sach phau thuat xung dung tvqg marketing", "co sach thu thuat xung dung tvqg marketing", "co sach nha thuat cung dung tvqg marketing", "co sach nha thuat xung dung tong marketing", "bo sach nha thuat xung dung tvqg marketing", "cuon sach nha thuat xung dung tvqg marketing", "hoc sach nha thuat xung dung tvqg 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: (("co sach ky thuat hung dung trong marketing") or ("co sach nha thuat xung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sach ky thuat hung dung trong marketing") OR ("co sach nha thuat xung dung tvqg marketing")).
• Removing quotes may allow a broader search: (( co sach ky thuat hung dung trong marketing ) or ( co sach nha thuat xung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("co sach ky thuat hung dung trong marketing") or ("co sach nha thuat xung dung tvqg marketing"))*.