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 ky thuat ung dung tvqg marketing", "co sach my thuat ung dung tvqg marketing", "co sach kxy thuat ung dung tvqg marketing", "cuon sach y thuat ung dung tvqg marketing", "hoc sach y thuat ung dung tvqg marketing"
"bo sach y thuat ung dung tong marketing" » "bo sach y thuat ung dung trong marketing", "bo sach y thuat ung dung dong marketing", "bo sach y thuat ung dung trinh marketing", "bo sach y thuat dung dung tong marketing", "bo sach y thuat hung dung tong marketing", "bo sach y thuat xung dung tong marketing", "bo sach y thuat ung dung thong marketing", "bo sach y thuat ung dung cong marketing", "hoc sach y thuat ung dung tong marketing", "bo sach ky thuat ung dung tong marketing", "bo sach my thuat ung dung tong marketing", "bo sach kxy thuat ung dung tong marketing"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("bo sach y thuat ung dung tong marketing") or ("co sach y thuat ung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach y thuat ung dung tong marketing") OR ("co sach y thuat ung dung tvqg marketing"))*.
• Removing quotes may allow a broader search: (( bo sach y thuat ung dung tong marketing ) or ( co sach y thuat ung dung tvqg marketing ))*.