Perhaps you should try some spelling variations:
"bo sach thu thuat dung dung trong marketing" » "bo sach thu thuat dung dung tri marketing", "bo sach thu thuat ung dung trong marketing", "bo sach thu thuat xung dung trong marketing", "bo sach thu thuat song dung trong marketing", "bo sach phau thuat dung dung trong marketing", "bo sach thu hut dung dung trong marketing", "bo sach thu thuat dung ung trong marketing", "bo sach thu thuat dung dong trong marketing", "bo sach thue thuat dung dung trong marketing", "bo sach thieu thuat dung dung trong marketing", "bo sach tham thuat dung dung trong marketing", "co sach thu thuat dung dung trong marketing", "hoc sach thu thuat dung dung trong marketing"
"bo sach y thuat hung dung tvqg marketing" » "bo sach y thuat hung dung tri marketing", "bo sach y thuat ung dung tvqg marketing", "bo sach y thuat xung dung tvqg marketing", "bo sach y thuat chuong dung tvqg marketing", "bo sach y thuat nhung dung tvqg marketing", "bo sach y thuat phung dung tvqg marketing", "bo sach y thuat hung dung tong marketing", "co sach y thuat hung dung tvqg marketing", "hoc sach y thuat hung dung tvqg marketing", "bo sach ky thuat hung dung tvqg marketing", "bo sach my thuat hung dung tvqg marketing", "bo sach kxy thuat hung 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 thu thuat dung dung trong marketing") or ("bo sach y thuat hung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach thu thuat dung dung trong marketing") OR ("bo sach y thuat hung dung tvqg marketing")).
• Removing quotes may allow a broader search: (( bo sach thu thuat dung dung trong marketing ) or ( bo sach y thuat hung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach thu thuat dung dung trong marketing") or ("bo sach y thuat hung dung tvqg marketing"))*.