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

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 va thuc ung dung thuat marketing") or ("bo sach ky thuat ung dung trong marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach va thuc ung dung thuat marketing") OR ("bo sach ky thuat ung dung trong marketing"))*.
• Removing quotes may allow a broader search: (( bo sach va thuc ung dung thuat marketing ) or ( bo sach ky thuat ung dung trong marketing ))*.