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