Perhaps you should try some spelling variations:
"co sach y thuat ung dung trong marketing" » "co sach y thuat ung dung tri marketing", "co sach y thuat ung dung tvqg marketing", "co sach y thuat dung dung trong marketing", "co sach y thuat hung dung trong marketing", "co sach y thuat xung dung trong marketing", "bo sach y thuat ung dung trong marketing", "hoc sach y thuat ung dung trong marketing", "co sach ky thuat ung dung trong marketing", "co sach my thuat ung dung trong marketing", "co sach kxy thuat ung dung trong marketing"
"cuon sach ve thuat ung dung tren marketing" » "cuon sach ve thuat ung dung trinh marketing", "cuon sach ve thuat ung dung thien marketing", "cuon sach ve thuat ung dung tri marketing", "cuon sach ve thuat dung dung tren marketing", "cuon sach ve thuat hung dung tren marketing", "cuon sach ve thuat xung dung tren marketing", "duong sach ve thuat ung dung tren marketing", "cuoc cach ve thuat ung dung tren marketing", "nuoc sach ve thuat ung dung tren marketing", "cuon sach ve thuat ung dung trung marketing", "cuon sach va thuat ung dung tren marketing", "cuon sach ky thuat ung dung tren marketing", "cuon sach ki thuat ung dung tren marketing", "cuon sach de thuat ung dung tren marketing", "cuon sach viet thuat ung dung tren marketing"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sach y thuat ung dung trong marketing") OR ("cuon sach ve thuat ung dung tren marketing"))~.
• Removing quotes may allow a broader search: (( co sach y thuat ung dung trong marketing ) or ( cuon sach ve thuat ung dung tren marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("co sach y thuat ung dung trong marketing") or ("cuon sach ve thuat ung dung tren marketing"))*.