Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
viet dung » viet hung, viet huong, viet trung
dung song » dung cong, dung dong, vung song
hanh han » hanh nhan, hanh phan, hanh san
han viet » san viet, van viet, dan viet
van tuan » van quan, van ban, anh tuan
van tan » van ban, van tai, van thanh

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) OR (thien anh)) - hanh han viet dung song ((van tan) OR (van tuan)) ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - hanh han viet dung song ((van tan) OR (van tuan)) ca~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - hanh han viet dung song ((van tan) OR (van tuan)) ca*.