Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trung tuan » trung thanh, trung tam, truong thanh
hoc thieu » toc thieu, hoc hien
tran tuan » tran xuan, tran quang, tran thanh
trong tac » trong cac, tuong tac, trong tan
thanh cac » hanh cac, thanh bac, thanh ca
phan cau » phan dau, phan cac, phan tu

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: hoc thieu xanh - thanh ((trung tuan) OR (tran tuan)) dung trong tac ((thanh cac) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((trung tuan) OR (tran tuan)) dung trong tac ((thanh cac) or (phan cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((trung tuan) OR (tran tuan)) dung trong tac ((thanh cac) or (phan cau))*.