Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
thanh tung » thanh cong
hien hanh » dieu hanh
tung quan » tuong quan, trung quan, dung quan
quan dung » quang dung, quan duong, qua dung
dung song » dung cong, dung dong, vung song
song van » hoang van, trong van, duong van
van tuan » van quan, van ban, anh tuan
tuan cao » toan cao, juan cao, quang cao

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 (hien hanh)) - thanh tung quan dung song van tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - thanh tung quan dung song van tuan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (hien hanh)) - thanh tung quan dung song van tuan cao*.