Perhaps you should try some spelling variations:
"bo sach cac thuat hung dung trong marketing" » "bo sach cac thuat hung dung tri marketing", "bo sach cac thuat dung dung trong marketing", "bo sach cac thuat ung dung trong marketing", "bo sach cac thuat xung dung trong marketing", "bo sach va thuat hung dung trong marketing", "bo sach hoc thuat hung dung trong marketing", "bo sach cac thu hung dung trong marketing", "bo sach cac thuat nhung dung trong marketing", "bo sach cac thuat phung dung trong marketing", "bo sach cap thuat hung dung trong marketing", "bo sach bac thuat hung dung trong marketing", "bo sach bai thuat hung dung trong marketing", "hoc sach cac thuat hung dung trong marketing"
"co sach dao thuat song dung tvqg marketing" » "co sach dao thuat song dung tri marketing", "co sach dao phat song dung tvqg marketing", "co sach va thuat song dung tvqg marketing", "co sach tao thuan song dung tvqg marketing", "co sach dao thuat song duong tvqg marketing", "co sach dao thuat cong dung tvqg marketing", "co sach dao thuat song dong tvqg marketing", "co sach dao thuat song dung tong marketing", "co lanh dao thuat song dung tvqg marketing", "cuon sach dao thuat song dung tvqg marketing", "hoc sach dao thuat song 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 cac thuat hung dung trong marketing") or ("co sach dao thuat song dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach cac thuat hung dung trong marketing") OR ("co sach dao thuat song dung tvqg marketing")).
• Removing quotes may allow a broader search: (( bo sach cac thuat hung dung trong marketing ) or ( co sach dao thuat song dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach cac thuat hung dung trong marketing") or ("co sach dao thuat song dung tvqg marketing"))*.