Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
trung tuan » trung thanh, trung tam, tran tuan
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cua » truong cua, trung cap, dung cua
hang cong » dang cong, hang nong, bang cong
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
toan cau » toan cao, toan ban, toan tap

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 thiet tach - thanh ((trung cua) OR (trung tuan)) hang cong san ((than cap) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - thanh ((trung cua) OR (trung tuan)) hang cong san ((than cap) or (toan cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh ((trung cua) OR (trung tuan)) hang cong san ((than cap) or (toan cau))*.