Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
quan dang » quang dang, quan lang, quan dong
dang cong » dung cong
canh dan » canh van, sanh dan, thanh dan
dan quan » van quan, ban quan, dan luan
van than » van thanh, van thang, van phan
van tuan » van quan, van ban, anh tuan

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 (hien nhanh)) - canh dan quan dang cong ((van than) OR (van tuan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - canh dan quan dang cong ((van than) or (van tuan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - canh dan quan dang cong ((van than) or (van tuan)) cau*.