Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
doanh luan » doanh nhan
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban

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