Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
nhung cong » dung cong, thong cong, hang cong
doan tien » doan thien, doanh tien, toan tien
manh toan » thanh toan, anh tuan, tinh toan
san toan » van toan, dan toan, xuan toan
tinh he » trinh he, tinh ha, tich he
hinh he » hinh hoc, trinh he, dinh hue

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: doan tien thanh - canh ((tinh he) OR (hinh he)) nhung cong ((san toan) OR (manh toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doan tien thanh - canh ((tinh he) OR (hinh he)) nhung cong ((san toan) or (manh toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: doan tien thanh - canh ((tinh he) OR (hinh he)) nhung cong ((san toan) or (manh toan)) cao*.