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