Perhaps you should try some spelling variations:
"bo sach mau thuan ung dung trong marketing" » "bo sach mau thuan ung dung tri marketing", "bo sach mau thuan ung dung tvqg marketing", "bo sach mau than ung dung trong marketing", "bo sach nam thuan ung dung trong marketing", "bo sach van thuan ung dung trong marketing", "bo sach mau thuat ung dung trong marketing", "bo sach mau thuat dung dung trong marketing", "bo sach mau thuat hung dung trong marketing", "bo sach dau thuan ung dung trong marketing", "bo sach dao thuan ung dung trong marketing", "bo bach mai thuan ung dung trong marketing", "co sach mau thuan ung dung trong marketing", "hoc sach mau thuan ung dung trong marketing"
"hoc cac thu put nung dung trong marketing" » "hoc cac thu put nung dung tri marketing", "hoc cac thu put nung dung tvqg marketing", "hoc cac thu put nhung dung trong marketing", "hoc cac thu put dung dung trong marketing", "hoc cac thu put cung dung trong marketing", "hoc cao thu put nung dung trong marketing", "hoc cach thuc put nung dung trong marketing", "hoc cac thoi put nung dung trong marketing", "hoc cac thu hut nung dung trong 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 mau thuan ung dung trong marketing") or ("hoc cac thu put nung dung trong marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach mau thuan ung dung trong marketing") OR ("hoc cac thu put nung dung trong marketing")).
• Removing quotes may allow a broader search: (( bo sach mau thuan ung dung trong marketing ) or ( hoc cac thu put nung dung trong marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach mau thuan ung dung trong marketing") or ("hoc cac thu put nung dung trong marketing"))*.