Perhaps you should try some spelling variations:
"bo bach mai thuat dung dung trong marketing" » "bo bach mai thuat dung dung tri marketing", "bo bach mai thuat dung dung tvqg marketing", "bo bach mai thuat hung dung trong marketing", "bo bach mai thuat xung dung trong marketing", "bo bach mai thuat song dung trong marketing", "bo bach mi thuat dung dung trong marketing", "bo bach ma thuat dung dung trong marketing", "bo bach giai thuat dung dung trong marketing", "bo bach mai thuat dung ung trong marketing", "bo bach mai thuat dung dong trong marketing", "bo bach mai thuat dang dung trong marketing", "bo sach mai thuat dung dung trong marketing", "bo trach mai thuat dung dung trong marketing", "noi bach mai thuat dung dung trong marketing"
"co sach y thuat ung dung trong marketing" » "co sach y thuat ung dung tri marketing", "co sach y thuat ung dung tvqg marketing", "co sach y thuat hung dung trong marketing", "co sach y thuat xung dung trong marketing", "co sach y thuat song dung trong marketing", "bo sach y thuat ung dung trong marketing", "cuon sach y thuat ung dung trong marketing", "hoc sach y thuat ung dung trong marketing", "co sach ky thuat ung dung trong marketing", "co sach my thuat ung dung trong marketing", "co sach kxy thuat ung 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 bach mai thuat dung dung trong marketing") or ("co sach y thuat ung dung trong marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo bach mai thuat dung dung trong marketing") OR ("co sach y thuat ung dung trong marketing")).
• Removing quotes may allow a broader search: (( bo bach mai thuat dung dung trong marketing ) or ( co sach y thuat ung dung trong marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo bach mai thuat dung dung trong marketing") or ("co sach y thuat ung dung trong marketing"))*.