Perhaps you should try some spelling variations:
"co sac ky thuat xung dung trong marketing" » "co sac ky thuat xung dung tri 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 tvqg marketing" » "bo sach ky thuat xung dung tri marketing", "bo sach ky thuat dung dung tvqg marketing", "bo sach ky thuat hung dung tvqg marketing", "bo sach ky thuat ung dung tvqg marketing", "bo sach ky thuat cung dung tvqg marketing", "bo sach ky thuat xung dung tong marketing", "co sach ky thuat xung dung tvqg marketing", "hoc sach ky thuat xung dung tvqg marketing", "bo sach y thuat xung dung tvqg marketing", "bo sach ty thuat xung dung tvqg marketing", "bo sach kem thuat xung dung tvqg marketing"

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 tvqg marketing"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"co sac ky thuat xung dung trong marketing\") OR (\"bo sach ky thuat xung dung tvqg marketing\"))".
• Removing quotes may allow a broader search: (( co sac ky thuat xung dung trong marketing ) OR ( bo sach ky thuat xung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("co sac ky thuat xung dung trong marketing") OR ("bo sach ky thuat xung dung tvqg marketing"))*.