Perhaps you should try some spelling variations:
tay long » ta long, tay cong, tay dong
tac long » tac dong, ta long, tac trong
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
hoa hoi » khoa hoi, hoa hoc, hoa doi
hieu ke » hieu kem, chieu ke, hieu ky
che hoc » cho hoc, che thuoc, chat hoc
di cua » dai cua, doi cua, de cua
che ho » che do, he ho, che khoa
cua te » cua tu

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: te sach ((tay long) OR (tac long)) hoa hoi. hieu ke ((che hoc) OR (che ho)) van hanh di cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tay long) OR (tac long)) hoa hoi. hieu ke ((che hoc) or (che ho)) van hanh di cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ((tay long) OR (tac long)) hoa hoi. hieu ke ((che hoc) or (che ho)) van hanh di cua te*.