Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
tran nhan » tran nhat, tan nhan, tran thanh
tran han » tran hanh, tran hoan, tran van
tong dan » tuong dan, thong dan, trong dan
dan can » dan chan, dan canh, dan ca
can cau » van cau, ban cau, ca cau

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh trung ((tran han) OR (tran nhan)) tong dan can cau~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung ((tran han) OR (tran nhan)) tong dan can cau*.