Perhaps you should try some spelling variations:
thuong duong » tuong duong, thuong luong, chuong duong
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
xanh hanh » danh thanh, van hanh, dang hanh
duong dan » duong dang, huong dan, duong van
ban hanh » ban hang
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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)) - ((xanh hanh) or (ban hanh)) luat thuong duong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - ((xanh hanh) OR (ban hanh)) luat thuong duong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - ((xanh hanh) or (ban hanh)) luat thuong duong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - ((xanh hanh) or (ban hanh)) luat thuong duong dan toan cau*.