Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hoc doanh » hoa doanh, hoc danh, hoc dan
van thanh » ban thanh, van tuan
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoan hoc » hoa hoc, toan hoc, hoang hoa
su sach » so sach, vu sach
bai tai » ban tai, dai tai, bai thi
hai van » thai van, ha van, hai tan
hoc ta » hoc tap, hoc tai, hoc tan
ta hai » tai hai, tac hai, tra hai

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 ((bai tai) OR (bai tap)), nghien cuu cong hoc doanh hoan hoc ta hai van thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((bai tai) OR (bai tap)), nghien cuu cong hoc doanh hoan hoc ta hai van thanh san".
• Adding a wildcard symbol may retrieve word variants: su sach ((bai tai) OR (bai tap)), nghien cuu cong hoc doanh hoan hoc ta hai van thanh san*.