Perhaps you should try some spelling variations:
"co sach ky thuat ung dung trong marketing" » "co sach ky thuat ung dung tri marketing", "co sach ky thuat ung dung tvqg marketing", "co sach ky thuat hung dung trong marketing", "co sach ky thuat xung dung trong marketing", "co sach ky thuat song dung trong marketing", "bo sach ky thuat ung dung trong marketing", "cuon sach ky thuat ung dung trong marketing", "co sac ky thuat ung dung trong marketing", "co sach y thuat ung dung trong marketing", "co sach ty thuat ung dung trong marketing"
"hoc sach ki thuat dung dong thi marketing" » "hoc sach ki thuat dung dong tri marketing", "hoc sach ki thuat dung dong thien marketing", "hoc sach ki thuat dung dong thay marketing", "hoc sach ki thuat hung dong thi marketing", "hoc sach ki thuat xung dong thi marketing", "hoc sach ki thuat song dong thi marketing", "hoc sach ki thuat dung cong thi marketing", "hoc sach ki thuat vung dong thi marketing", "hoc sach ki thuat cong dong thi marketing", "hoc sinh ki thuat dung dong thi marketing", "hoc cac ki thuat dung dong thi marketing", "hoc anh ki thuat dung dong thi marketing", "hoc sach ki thuat dung duong thi marketing", "hoc sach ki thuat dung dang thi marketing", "hoc sach ki thuat dung dong tai marketing", "hoc sach kinh thuat dung dong thi marketing", "hoc sach bai thuat dung dong thi marketing", "hoc sach kem thuat dung dong 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: (("hoc sach ki thuat dung dong thi marketing") or ("co sach ky thuat ung dung trong marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("hoc sach ki thuat dung dong thi marketing") OR ("co sach ky thuat ung dung trong marketing"))*.
• Removing quotes may allow a broader search: (( hoc sach ki thuat dung dong thi marketing ) or ( co sach ky thuat ung dung trong marketing ))*.