Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
trung tuan » trung thanh, trung tam, tran tuan
truong cua » truong ca, truong quan, truong cao
nhung cong » dung cong, thong cong, hang cong
so thiet » soc thiet, hoc thiet, hoa thiet
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so thiet tach - thanh ((trung tuan) or (truong cua)) nhung cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so thiet tach - thanh ((trung tuan) OR (truong cua)) nhung cong dan than cap*.