Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh toan » doanh hoan, doanh doanh, doanh thanh
hoc doanh » hoa doanh, hoc danh, hoc dan
van thanh » ban thanh, van tuan
sach hoi » sach doi, sach moi, cach thoi
cong hoc » dong hoc, cong hoa, cong coc
toan hoc » toan khoa, van hoc, hoa hoc
mai khoi » mai khoa, tai khoa, cac khoi
su sach » so sach, vu sach
hoi tap » hoi dap, hoc tap, hoi tai
mai hoi » dai hoi, lai hoi, mai doi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoi tap, nghien cua cong hoc doanh toan hoc ((mai hoi) OR (mai khoi)) van thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoi tap, nghien cua cong hoc doanh toan hoc ((mai hoi) OR (mai khoi)) van thanh san".
• Adding a wildcard symbol may retrieve word variants: su sach hoi tap, nghien cua cong hoc doanh toan hoc ((mai hoi) OR (mai khoi)) van thanh san*.