Perhaps you should try some spelling variations:
chiet tach » chieu sach
trung tuan » trung thanh, trung tam, tran tuan
trung cua » truong cua, trung cap, dung cua
nong cong » cong cong, tong cong, nang cong
ho chiet » ho chieu, ho thiet, hoc thiet
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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 cua) or (trung tuan)) nong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung cua) OR (trung tuan)) nong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung cua) or (trung tuan)) nong cong tac toan cau*.