Perhaps you should try some spelling variations:
hien thanh » thien thanh, hien hanh, tien thanh
doanh luan » doanh nhan
luan nhung » luan chung, luan hung, quan nhung
dong thanh » truong thanh
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban

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 thanh - toan doanh luan nhung ((cong tan) OR (dong thanh)) ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien thanh - toan doanh luan nhung ((cong tan) or (dong thanh)) ((toan cao) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien thanh - toan doanh luan nhung ((cong tan) or (dong thanh)) ((toan cao) OR (toan ban))*.