Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chiet tach » chieu sach
trung tuan » trung thanh, trung tam, tran tuan
khong cong » thong cong, khong cang, chong cong
trung cua » truong cua, trung cap, dung cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu tinh) or (chiet tach)) - thanh ((trung cua) OR (trung tuan)) khong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chiet tach)) - thanh ((trung cua) OR (trung tuan)) khong cong san toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (chiet tach)) - thanh ((trung cua) OR (trung tuan)) khong cong san toan ban*".