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 tai marketing" » "bo sach va thuc cuong dung tri marketing", "bo sach va thuc cuong dung tac marketing", "bo sach va thuc cuong dung thi marketing", "bo sach va thu cuong dung tai marketing", "bo sach va thuc cung dung tai marketing", "bo sach va thuc uong dung tai marketing", "bo sach va thuc tuong duong tai marketing", "bo sach va thuc ung dung tai marketing", "bo sach va thuc thong dung tai marketing", "co sach va thuc cuong dung tai marketing", "hoc sach va thuc cuong dung tai marketing", "bo sach xa thuc cuong dung tai marketing", "bo sach ha thuc cuong dung tai marketing", "bo sach dao thuc cuong 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 cuong dung tai 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 tai marketing") OR ("bo sach ky thuat xung dung tren marketing"))*.
• Removing quotes may allow a broader search: (( bo sach va thuc cuong dung tai marketing ) or ( bo sach ky thuat xung dung tren marketing ))*.