Perhaps you should try some spelling variations:
"co sach y thuat ung dung tvqg marketing" » "co sach y thuat ung dung trong marketing", "co sach y thuat ung dung tri marketing", "co sach y thuat dung dung tvqg marketing", "co sach y thuat hung dung tvqg marketing", "co sach y thuat xung dung tvqg marketing", "co sach y thuat ung dung tong marketing", "bo sach y thuat ung dung tvqg marketing", "cuon sach y thuat ung dung tvqg marketing", "co sach my thuat ung dung tvqg marketing", "co sach kxy thuat ung dung tvqg marketing", "co sach ki thuat ung dung tvqg marketing"
"hoc sach ky thuat ung dung cuu marketing" » "hoc sach ky thuat ung dung luoc marketing", "hoc sach ky thuat ung dung _ marketing", "hoc sach ky thuat ung dung tri marketing", "hoc sach ky thuat dung dung cuu marketing", "hoc sach ky thuat hung dung cuu marketing", "hoc sach ky thuat xung dung cuu marketing", "hoc sinh ky thuat ung dung cuu marketing", "hoc cac ky thuat ung dung cuu marketing", "hoc anh ky thuat ung dung cuu marketing", "hoc sach ky thuat ung dung cua marketing", "hoc sach ky thuat ung dung cu marketing", "hoc sach ky thuat ung dung cau marketing", "hoc sach kmy thuat ung dung cuu marketing", "hoc sach kkxy thuat ung dung cuu marketing", "hoc sach kki thuat ung dung cuu marketing", "hoc sac ky thuat ung dung cuu marketing", "hoc sach ty thuat ung dung cuu marketing", "hoc sach kem thuat ung dung cuu 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: (("co sach y thuat ung dung tvqg marketing") OR ("hoc sach ky thuat ung dung cuu marketing"))~.
• Removing quotes may allow a broader search: (( co sach y thuat ung dung tvqg marketing ) or ( hoc sach ky thuat ung dung cuu marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("co sach y thuat ung dung tvqg marketing") or ("hoc sach ky thuat ung dung cuu marketing"))*.