Perhaps you should try some spelling variations:
trinh thanh » tinh thanh, trinh han, trinh toan
chiet tach » chieu sach
trung tuan » trung thanh, tran tuan, truong thanh
nhung cong » dung cong, thong cong, hang cong
thanh cap » thanh lap, hanh cap, than cap
ho chiet » ho chieu, ho thiet, hoc thiet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - thanh ((trung tuan) or (trung tam)) nhung cong trinh thanh cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung tuan) OR (trung tam)) nhung cong trinh thanh cap.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung tuan) or (trung tam)) nhung cong trinh thanh cap*.