Perhaps you should try some spelling variations:
"co chu ky thuat phung dung tren marketing" » "co chu ky thuat phung dung trong marketing", "co chu ky thuat phung dung trinh marketing", "co chu ky thuat phung dung thien marketing", "co chu ky thuat hung dung tren marketing", "co chu ky thuat chung dung tren marketing", "co chu ky thuat nhung dung tren marketing", "co chu ky thuat phuong dung tren marketing", "co chu ky thuat phung dang tren marketing", "co chu ky thuat phung dung trung marketing", "cho chu ky thuat phung dung tren marketing", "cao chu ky thuat phung dung tren marketing", "co che ky thuat phung dung tren marketing"
"co sach ky thuat xung dung tri marketing" » "co sach ky thuat xung dung trong marketing", "co sach ky thuat xung dung tvqg marketing", "co sach ky thuat xung dung _ marketing", "co sach ky thuat dung dung tri marketing", "co sach ky thuat hung dung tri marketing", "co sach ky thuat ung dung tri marketing", "co sach ky thuat cung dung tri marketing", "co sach ky thuat xung dung tai marketing", "co sach ky thuat xung dung sai marketing", "co sach ky thuat xung dung doi marketing", "bo sach ky thuat xung dung tri marketing", "cuon sach ky thuat xung dung tri marketing", "hoc sach ky thuat xung dung tri marketing", "co sac ky thuat xung dung tri marketing", "co sach y thuat xung dung tri marketing", "co sach ty thuat xung dung tri 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 ky thuat xung dung tri marketing") OR ("co chu ky thuat phung dung tren marketing"))~.
• Removing quotes may allow a broader search: (( co sach ky thuat xung dung tri marketing ) or ( co chu ky thuat phung dung tren marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("co sach ky thuat xung dung tri marketing") or ("co chu ky thuat phung dung tren marketing"))*.