Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
van hanh » van thanh, ban hanh, van anh
cac thoi » cac toi, cac hop, cac tro
hanh de » hanh ve, hanh kem
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
de cua » le cua, te cua, dieu cua
ca thu » cac thu, cam thu, ca tru

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. hieu ve ((ca thu) OR (cac thoi)) van hanh de cua viet~.
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (nang x)) hoi. hieu ve ((ca thu) or (cac thoi)) van hanh de cua viet*.