Perhaps you should try some spelling variations:
"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", "co 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"
"hoc sach y thuat ung dung tvqg marketing" » "hoc sach y thuat ung dung trong marketing", "hoc sach y thuat ung dung tri marketing", "hoc sach y thuat dung dung tvqg marketing", "hoc sach y thuat hung dung tvqg marketing", "hoc sach y thuat xung dung tvqg marketing", "hoc sinh y thuat ung dung tvqg marketing", "hoc cac y thuat ung dung tvqg marketing", "hoc anh y thuat ung dung tvqg marketing", "hoc sach ky thuat ung dung tvqg marketing", "hoc sach my thuat ung dung tvqg marketing", "hoc sach kxy thuat ung 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: (("bo sach y thuat ung dung tong marketing") or ("hoc 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 ("hoc sach y thuat ung dung tvqg marketing")).
• Removing quotes may allow a broader search: (( bo sach y thuat ung dung tong marketing ) or ( hoc sach y thuat ung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach y thuat ung dung tong marketing") or ("hoc sach y thuat ung dung tvqg marketing"))*.