Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
trung tuan » trung thanh, trung tam, tran tuan
cong tran » cong tuan, cong toan, cong tren
hoc tien » hoc tieng, hoc hien, hoc vien
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong thanh

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: hoc tien thanh - hanh ((trung tuan) OR (tang cua)) hang ((cong tran) OR (cong tan)) van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tien thanh - hanh ((trung tuan) or (tang cua)) hang ((cong tran) OR (cong tan)) van ban~".
• Adding a wildcard symbol may retrieve word variants: hoc tien thanh - hanh ((trung tuan) or (tang cua)) hang ((cong tran) OR (cong tan)) van ban*.