Perhaps you should try some spelling variations:
"bo sach ki thuat hung dung trong marketing" » "bo sach ki thuat hung dung tri marketing", "bo sach ki thuat dung dung trong marketing", "bo sach ki thuat ung dung trong marketing", "bo sach ki thuat xung dung trong marketing", "bo sach ki thuat nhung dung trong marketing", "bo sach ki thuat phung dung trong marketing", "bo sach ky thuat hung dung trong marketing", "co sach ki thuat hung dung trong marketing", "hoc sach ki thuat hung dung trong marketing", "bo sach kinh thuat hung dung trong marketing", "bo sach bai thuat hung dung trong marketing", "bo sach kem thuat hung dung trong marketing"
"bo sach va thuc hong dung tvqg marketing" » "bo sach va thuc hong dung tri marketing", "bo sach va thuc khong dung tvqg marketing", "bo sach va thuy hong dung tvqg marketing", "bo sach va thu hong dung tvqg marketing", "bo sach va thuc thong dung tvqg marketing", "bo sach va thuc hoang dung tvqg marketing", "bo sach va thuc hong dung tong marketing", "co sach va thuc hong dung tvqg marketing", "hoc sach va thuc hong dung tvqg marketing", "bo sach xa thuc hong dung tvqg marketing", "bo sach ha thuc hong dung tvqg marketing", "bo sach dao thuc hong 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 ki thuat hung dung trong marketing") or ("bo sach va thuc hong dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach ki thuat hung dung trong marketing") OR ("bo sach va thuc hong dung tvqg marketing")).
• Removing quotes may allow a broader search: (( bo sach ki thuat hung dung trong marketing ) or ( bo sach va thuc hong dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach ki thuat hung dung trong marketing") or ("bo sach va thuc hong dung tvqg marketing"))*.