Perhaps you should try some spelling variations:
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"co sach va thuc xung dung tvqg marketing" » "co sach va thuc xung dung tri marketing", "co sach va thuc dung dung tvqg marketing", "co sach va thuc cung dung tvqg marketing", "co sach va thuc vung dung tvqg marketing", "co sach va thuc ung dung tvqg marketing", "co sach va thuc xung dung tong marketing", "co sach xa thuc xung dung tvqg marketing", "co sach ha thuc xung dung tvqg marketing", "co sach dao thuc xung dung tvqg marketing", "cuon sach va thuc xung dung tvqg marketing", "hoc sach va thuc xung dung tvqg 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 va thuat song dung trong marketing") or ("co sach va thuc xung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach va thuat song dung trong marketing") OR ("co sach va thuc xung dung tvqg marketing")).
• Removing quotes may allow a broader search: (( bo sach va thuat song dung trong marketing ) or ( co sach va thuc xung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach va thuat song dung trong marketing") or ("co sach va thuc xung dung tvqg marketing"))*.