Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, dien thanh
tien thanh » tien thinh, tran thanh, den thanh
thanh tung » thanh cong
dang cong » dung cong
van thanh » ban thanh, van tuan
tung cua » trung cua, tuong cua, dung cua
cua dang » cua cong, cua ban
dan toan » van toan, dan than, manh toan

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 nhanh) or (tien thanh)) - thanh tung cua dang cong ((dan toan) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (tien thanh)) - thanh tung cua dang cong ((dan toan) OR (van thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (tien thanh)) - thanh tung cua dang cong ((dan toan) or (van thanh)) cao*.