Perhaps you should try some spelling variations:
"bo sach ky thuat song dung tri marketing" » "bo sach ky thuat song dung trong marketing", "bo sach ky thuat song dung tvqg marketing", "bo sach ky thuat song dung _ marketing", "bo sach ky thuat song duong tri marketing", "bo sach ky thuat cong dung tri marketing", "bo sach ky thuat song dong tri marketing", "bo sach ky thuat song dung tai marketing", "bo sach ky thuat song dung tren marketing", "bo sach ky thuat song dung sai marketing", "co sach ky thuat song dung tri marketing", "hoc sach ky thuat song dung tri marketing", "bo sac ky thuat song dung tri marketing", "bo sach y thuat song dung tri marketing", "bo sach ty thuat song dung tri marketing"
"bo sach ki thuat xung dung va marketing" » "bo sach ki thuat xung dung van marketing", "bo sach ki thuat xung dung tac marketing", "bo sach ki thuat xung dung gia marketing", "bo sach ki thuat dung dung va marketing", "bo sach ki thuat hung dung va marketing", "bo sach ki thuat ung dung va marketing", "bo sach ki thuat cung dung va marketing", "co sach ki thuat xung dung va marketing", "hoc sach ki thuat xung dung va marketing", "bo sach kinh thuat xung dung va marketing", "bo sach bai thuat xung dung va marketing", "bo sach kem thuat xung dung va 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 ki thuat xung dung va marketing") or ("bo sach ky thuat song dung tri marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach ki thuat xung dung va marketing") OR ("bo sach ky thuat song dung tri marketing"))*.
• Removing quotes may allow a broader search: (( bo sach ki thuat xung dung va marketing ) or ( bo sach ky thuat song dung tri marketing ))*.