Perhaps you should try some spelling variations:
"hoc cac ky thuat ung dung trong marketing" » "hoc cac ky thuat ung dung tvqg marketing", "hoc cac ky thuat hung dung trong marketing", "hoc cac ky thuat xung dung trong marketing", "hoc cac ky thuat song dung trong marketing", "hoc cao ky thuat ung dung trong marketing"
"bo sach phau thuat dung dung tri marketing" » "bo sach phau thuat dung dung tvqg marketing", "bo sach phau thuat dung dung _ marketing", "bo sach phau thuat dung dung cuu marketing", "bo sach phau thuat hung dung tri marketing", "bo sach phau thuat xung dung tri marketing", "bo sach phau thuat song dung tri marketing", "bo sach phat thuat dung dung tri marketing", "bo sach phap thuat dung dung tri marketing", "bo sach nha thuat dung dung tri marketing", "bo sach phau thuat dung ung tri marketing", "bo sach phau thuat dung dong tri marketing", "bo sach phau thuat dang dung tri marketing", "bo sach phau thuat dung dung tai marketing", "bo sach phau thuat dung dung tren marketing", "bo sach phau thuat dung dung sai marketing", "co sach phau thuat dung dung tri marketing", "hoc sach phau thuat dung 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: (("hoc cac ky thuat ung dung trong marketing") OR ("bo sach phau thuat dung dung tri marketing"))~.
• Removing quotes may allow a broader search: (( hoc cac ky thuat ung dung trong marketing ) or ( bo sach phau thuat dung dung tri marketing ))~.
• Adding a wildcard symbol may retrieve word variants: (("hoc cac ky thuat ung dung trong marketing") or ("bo sach phau thuat dung dung tri marketing"))*.