Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trang » thanh trung, canh tranh, hanh trinh
trang viet » tran viet, trung viet, truong viet
hien xanh » hien hanh, chieu xanh, hien khanh
viet dung » viet hung, viet huong, viet trung
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) OR (hien nhanh)) - hanh trang viet dung trong ((van toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - hanh trang viet dung trong ((van toan) OR (van tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - hanh trang viet dung trong ((van toan) or (van tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - hanh trang viet dung trong ((van toan) or (van tuan)) cau*.