Perhaps you should try some spelling variations:
"bo sach ky thuat phung dung tvqg marketing" » "bo sach ky thuat phung dung trong marketing", "bo sach ky thuat phung dung tri marketing", "bo sach ky thuat hung dung tvqg marketing", "bo sach ky thuat chung dung tvqg marketing", "bo sach ky thuat nhung dung tvqg marketing", "bo sach ky thuat phuong dung tvqg marketing", "bo sach ky thuat phung dang tvqg marketing", "bo sach ky thuat phung dung tong marketing", "co sach ky thuat phung dung tvqg marketing", "hoc sach ky thuat phung dung tvqg marketing", "bo sac ky thuat phung dung tvqg marketing", "bo sach y thuat phung dung tvqg marketing", "bo sach ty thuat phung dung tvqg marketing"
"bo sach dau tu pdung dung tai marketing" » "bo sach dau tu pdung dung tri marketing", "bo sach dau tu pdung dung tac marketing", "bo sach dau tu pdung dung thi marketing", "bo sach dau tu dung dung tai marketing", "bo sach dau tu phuong dung tai marketing", "bo sach dau tu ung dung tai marketing", "bo sach dao tu pdung dung tai marketing", "bo sach dat tu pdung dung tai marketing", "bo sach mau tu pdung dung tai marketing", "bo sach dau su dung dung tai marketing", "bo sach dau tu vung dung tai marketing", "co sach dau tu pdung dung tai marketing", "hoc sach dau tu pdung dung tai 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 dau tu pdung dung tai marketing") or ("bo sach ky thuat phung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach dau tu pdung dung tai marketing") OR ("bo sach ky thuat phung dung tvqg marketing")).
• Removing quotes may allow a broader search: (( bo sach dau tu pdung dung tai marketing ) or ( bo sach ky thuat phung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach dau tu pdung dung tai marketing") or ("bo sach ky thuat phung dung tvqg marketing"))*.