Perhaps you should try some spelling variations:
"bo sach my thuat dung dung tri marketing" » "bo sach my thuat dung dung trong marketing", "bo sach my thuat dung dung tvqg marketing", "bo sach my thuat dung dung _ marketing", "bo sach my thuat hung dung tri marketing", "bo sach my thuat ung dung tri marketing", "bo sach my thuat xung dung tri marketing", "bo sach my thuat dung ung tri marketing", "bo sach my thuat dung dong tri marketing", "bo sach ki thuat dung dung tri marketing", "bo sach va thuat dung dung tri marketing", "bo sach my thuat dung dung tai marketing", "bo sach my thuat dung dung tren marketing", "bo sach my thuat dung dung sai marketing", "co sach my thuat dung dung tri marketing", "hoc sach my thuat dung dung tri marketing", "bo sach y thuat dung dung tri marketing", "bo sach ty thuat dung dung tri marketing", "bo sach mau thuat dung dung tri marketing"
"bo sach ky thuat cong dung van marketing" » "bo sach ky thuat cong dung tac marketing", "bo sach ky thuat cong dung phap marketing", "bo sach ky thuat cong dung tvqg marketing", "bo sach ky thuat song dung van marketing", "bo sach ky thuat trong dung van marketing", "bo sach ky thu cong dung van marketing", "bo sach ky thuat cuong dung van marketing", "bo sach ky thuat cong dong van marketing", "bo sach ky thuat cong luong van marketing", "bo sach ky thuat cong duong van marketing", "bo sach ky thuat cong dung va marketing", "bo sach ky thuat cong dang van marketing", "co sach ky thuat cong dung van marketing", "hoc sach ky thuat cong dung van marketing", "bo sac ky thuat cong dung van marketing", "bo sach y thuat cong dung van marketing", "bo sach ty thuat cong dung van 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 my thuat dung dung tri marketing") or ("bo sach ky thuat cong dung van marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach my thuat dung dung tri marketing") OR ("bo sach ky thuat cong dung van marketing")).
• Removing quotes may allow a broader search: (( bo sach my thuat dung dung tri marketing ) or ( bo sach ky thuat cong dung van marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach my thuat dung dung tri marketing") or ("bo sach ky thuat cong dung van marketing"))*.