Perhaps you should try some spelling variations:
thanh trung » thanh tung
tien thanh » tien thinh, tran thanh, den thanh
trung tuan » trung thanh, trung tam, tran tuan
khong cang » hong bang, khong dung, thong cung
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

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