Perhaps you should try some spelling variations:
"bo sac ky thuat ung dung tong marketing" » "bo sac ky thuat ung dung trong marketing", "bo sac ky thuat ung dung dong marketing", "bo sac ky thuat ung dung tvqg marketing", "bo sac ky thuat dung dung tong marketing", "bo sac ky thuat hung dung tong marketing", "bo sac ky thuat xung dung tong marketing", "bo sac ky thuat ung dung thong marketing", "bo cac ky thuat ung dung tong marketing", "bo sai ky thuat ung dung tong marketing"
"bo sach xa thuc dung cong tri marketing" » "bo sach xa thuc dung cong trong marketing", "bo sach xa thuc dung cong tvqg marketing", "bo sach xa thuc dung cong _ marketing", "bo sach xa thuoc dung cong tri marketing", "bo sach xa thuy dung cong tri marketing", "bo sach xa tuc dung cong tri marketing", "bo sach xa thuc dung trong tri marketing", "bo sach xa thuc dung cong ti marketing", "bo sach xa thuc dung dong tri marketing", "bo sach xa thuc dung cong tai marketing", "co sach xa thuc dung cong tri marketing", "hoc sach xa thuc dung cong tri marketing", "bo sach dao thuc dung cong tri marketing", "bo sach nha thuc dung cong tri marketing", "bo sach bai thuc dung cong tri marketing", "bo sach va thuc dung cong tri marketing", "bo sach xa phuc dung cong tri marketing", "bo sach a thuc dung cong tri marketing"

Try widening your search to All Fields.

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 xa thuc dung cong tri marketing") or ("bo sac ky thuat ung dung tong marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach xa thuc dung cong tri marketing") OR ("bo sac ky thuat ung dung tong marketing")).
• Removing quotes may allow a broader search: (( bo sach xa thuc dung cong tri marketing ) or ( bo sac ky thuat ung dung tong marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach xa thuc dung cong tri marketing") or ("bo sac ky thuat ung dung tong marketing"))*.