Perhaps you should try some spelling variations:
"co sach ky thuat xung dung trong marketing" » "co sach ky thuat xung dung tvqg marketing", "co sach ky thuat dung dung trong marketing", "co sach ky thuat hung dung trong marketing", "co sach ky thuat song dung trong marketing", "co sach ky thuat cung dung trong marketing", "co sach ky thuat cuong dung trong marketing", "bo sach ky thuat xung dung trong marketing", "cuon sach ky thuat xung dung trong marketing", "hoc sach ky thuat xung dung trong marketing", "co sac ky thuat xung dung trong marketing", "co sach y thuat xung dung trong marketing", "co sach kem thuat xung dung trong marketing"
"co sach ty thuat ung dung tri marketing" » "co sach ty thuat ung dung tvqg marketing", "co sach ty thuat ung dung _ marketing", "co sach ty thuat ung dung cuu marketing", "co sach ty thuat dung dung tri marketing", "co sach ty thuat hung dung tri marketing", "co sach ty thuat song dung tri marketing", "co sach my thuat ung dung tri marketing", "co sach te thuat ung dung tri marketing", "co sach thu thuat ung dung tri marketing", "co sach ty thuat ung dung tai marketing", "co sach ty thuat ung dung tren marketing", "co sach ty thuat ung dung sai marketing", "bo sach ty thuat ung dung tri marketing", "cuon sach ty thuat ung dung tri marketing", "hoc sach ty thuat ung dung tri marketing", "co sach y thuat ung dung tri marketing", "co sach tu thuat ung dung tri 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 sach ky thuat xung dung trong marketing") or ("co sach ty thuat ung dung tri marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sach ky thuat xung dung trong marketing") OR ("co sach ty thuat ung dung tri marketing"))*.
• Removing quotes may allow a broader search: (( co sach ky thuat xung dung trong marketing ) or ( co sach ty thuat ung dung tri marketing ))*.