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