Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
thong song » thong cong, thong dong, thong hong
hien xanh » chieu xanh, hien khanh, khien canh
hien hanh » dieu hanh
tao thong » tao trong, giao thong, toan thong
cong tao » cong tac, cong tan, cong bao
song van » hoang van, trong van, duong van
van phan » van phong, van thanh, luan phan
phan cau » phan dau, phan cac, phan tu

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 hanh))) or (hien nhanh)) - thanh cong tao thong song van phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hien xanh) OR (hien hanh))) OR (hien nhanh)) - thanh cong tao thong song van phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hien xanh) OR (hien hanh))) or (hien nhanh)) - thanh cong tao thong song van phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((((hien xanh) OR (hien hanh))) or (hien nhanh)) - thanh cong tao thong song van phan cau*.