Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, tran tuan, truong thanh
duong cong » dung cong, luong cong, duong trong
ho chieu » theo chieu, hoc thieu, doi chieu
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan

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: ho chieu xanh - thanh ((trung tuan) OR (trung tam)) duong cong ((tac toan) OR (tam toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - thanh ((trung tuan) or (trung tam)) duong cong ((tac toan) OR (tam toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh ((trung tuan) or (trung tam)) duong cong ((tac toan) OR (tam toan)) cao*.