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 tren marketing", "bo sach ky thuat song dung sai marketing", "bo sach ky thuat song dung doi 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 hung dung tai marketing" » "bo sach ki thuat hung dung tac marketing", "bo sach ki thuat hung dung thi marketing", "bo sach ki thuat hung dung thay marketing", "bo sach ki thuat dung dung tai marketing", "bo sach ki thuat ung dung tai marketing", "bo sach ki thuat xung dung tai marketing", "bo sach ki thuat nhung dung tai marketing", "bo sach ki thuat phung dung tai marketing", "co sach ki thuat hung dung tai marketing", "hoc sach ki thuat hung dung tai marketing", "bo sach kinh thuat hung dung tai marketing", "bo sach bai thuat hung dung tai marketing", "bo sach kem thuat hung 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 ky thuat song dung tri marketing") or ("bo sach ki thuat hung dung tai marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach ky thuat song dung tri marketing") OR ("bo sach ki thuat hung dung tai marketing"))*.
• Removing quotes may allow a broader search: (( bo sach ky thuat song dung tri marketing ) or ( bo sach ki thuat hung dung tai marketing ))*.