Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, chieu xanh, hien khanh
cua thong » cua thuong, cua khong, cua tong
van manh » van minh, van anh, van hanh
manh cua » doanh cua, ban cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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) OR (hien nhanh)) - van manh cua thong cong dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - van manh cua thong cong dan toan cao*.