Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, tran tuan, truong thanh
dong trong » duong trong, dung trong, cong trong
trong tac » trong cac, tuong tac, trong tan
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: theo chieu xanh - thanh ((trung tuan) OR (trung tam)) dong trong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - thanh ((trung tuan) OR (trung tam)) dong trong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh ((trung tuan) OR (trung tam)) dong trong tac toan cau*.