Perhaps you should try some spelling variations:
"co sach ky thuat xung dung trong marketing" » "co sach ky thuat xung dung tri marketing", "co sach ky thuat dung dung trong marketing", "co sach ky thuat ung dung trong marketing", "co sach ky thuat song dung trong marketing", "co sach ky thuat cung dung trong marketing", "cuon sach ky thuat xung dung trong marketing", "hoc sach ky thuat xung dung trong marketing", "co sac ky thuat xung dung trong marketing", "co sach y thuat xung dung trong marketing", "co sach ty thuat xung dung trong marketing"
"bo sach ky thuat hung dung tvqg marketing" » "bo sach ky thuat hung dung tri marketing", "bo sach ky thuat dung dung tvqg marketing", "bo sach ky thuat ung dung tvqg marketing", "bo sach ky thuat chuong dung tvqg marketing", "bo sach ky thuat nhung dung tvqg marketing", "bo sach ky thuat phung dung tvqg marketing", "bo sach ky thuat hung dung tong marketing", "bo sac ky thuat hung dung tvqg marketing", "bo sach y thuat hung dung tvqg marketing", "bo sach ty thuat hung dung tvqg marketing", "hoc sach ky thuat hung 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 sach ky thuat xung dung trong marketing") OR ("bo sach ky thuat hung dung tvqg marketing"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"co sach ky thuat xung dung trong marketing\") OR (\"bo sach ky thuat hung dung tvqg marketing\"))".
• Removing quotes may allow a broader search: (( co sach ky thuat xung dung trong marketing ) OR ( bo sach ky thuat hung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("co sach ky thuat xung dung trong marketing") OR ("bo sach ky thuat hung dung tvqg marketing"))*.