Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thanh tung » thanh cong
thanh dong » thanh duong, thanh cong, hanh dong
hien xanh » hien hanh, chieu xanh, hien khanh
dong cong » duong cong, dung cong, dang cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan ban

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)) - ((thanh trung) OR (thanh tung)) thanh dong cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - ((thanh trung) OR (thanh tung)) thanh dong cong san toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien nhanh)) - ((thanh trung) OR (thanh tung)) thanh dong cong san toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien nhanh)) - ((thanh trung) OR (thanh tung)) thanh dong cong san toan tap*.