Perhaps you should try some spelling variations:
"bo sach ky thuat xung dung trung marketing" » "bo sach ky thuat xung dung trong marketing", "bo sach ky thuat xung dung trinh marketing", "bo sach ky thuat xung dung tri marketing", "bo sach ky thuat dung dung trung marketing", "bo sach ky thuat hung dung trung marketing", "bo sach ky thuat ung dung trung marketing", "bo sach ky thuat xung quang trung marketing", "bo sach ky thuat xung dung ung marketing", "bo sach ky thuat cung dung trung marketing", "bo sach ky thuat cuong dung trung marketing", "co sach ky thuat xung dung trung marketing", "hoc sach ky thuat xung dung trung marketing", "bo sac ky thuat xung dung trung marketing", "bo sach y thuat xung dung trung marketing", "bo sach ty thuat xung dung trung marketing"
"bo sach va thuc ung dung tai marketing" » "bo sach va thuc ung dung tri marketing", "bo sach va thuc ung dung tac marketing", "bo sach va thuc ung dung thi marketing", "bo sach va thuc dung dung tai marketing", "bo sach va thuc cung dung tai marketing", "bo sach va thuc uong dung tai marketing", "co sach va thuc ung dung tai marketing", "hoc sach va thuc ung dung tai marketing", "bo sach xa thuc ung dung tai marketing", "bo sach ha thuc ung dung tai marketing", "bo sach dao thuc ung dung tai 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 va thuc ung dung tai marketing") or ("bo sach ky thuat xung dung trung marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach va thuc ung dung tai marketing") OR ("bo sach ky thuat xung dung trung marketing"))*.
• Removing quotes may allow a broader search: (( bo sach va thuc ung dung tai marketing ) or ( bo sach ky thuat xung dung trung marketing ))*.