Perhaps you should try some spelling variations:
thanh doanh » hanh doanh, thanh toan, chinh doanh
dong thanh » truong thanh
sach thuc » cach thuc, sach thu, sach thue
hieu van » hieu va, thien van, lieu va
duc dong » duoc dong, duc dung, duc cong
cua viet » ca viet, hoa viet, cua dieu
vu sach » vu bach, su sach, vu khach
hanh ma » hanh mau, hanh may, hanh va
van cau » van dau, van hau, van chat
cau duc » cao duc, cau luc, chu duc
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach thuc hanh ma hoi. hieu van cau duc dong thanh doanh ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thuc hanh ma hoi. hieu van cau duc dong thanh doanh ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: vu sach thuc hanh ma hoi. hieu van cau duc dong thanh doanh ((cua viet) or (cua vat))*.