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