Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
dong trong » duong trong, dung trong, cong trong
hoc thieu » toc thieu, hoc hien
cac tuong » cac truong, cac phuong, cac chuong
cua dong » chua dong, cua cong, cua dang
cac tuan » cac thanh, cac thuat, mach tuan

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