Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
tran thuan » tran tuan, trong thuan, tran thanh
thuan cong » thuat cong, thuan phong, thuan trong
hien xanh » hien hanh, chieu xanh, hien khanh
manh tran » manh toan, manh tuan, canh tranh
tuong dan » huong dan, tung dan, truong dai
xuong dan » huong dan, xuong san, nguong dan
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)) - manh tran thuan cong ((tuong dan) OR (xuong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - manh tran thuan cong ((tuong dan) OR (xuong dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien nhanh)) - manh tran thuan cong ((tuong dan) OR (xuong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien nhanh)) - manh tran thuan cong ((tuong dan) OR (xuong dan)) toan cao*.