Perhaps you should try some spelling variations:
dang thuong » hang thuong, dung thuong, dong thuong
theo chieu » theo tieu, theo chu, thi chieu
thuong dan » huong dan, thuong han, thuong dam
doanh cua » doanh luan
ho chieu » hoc thieu, doi chieu, mot chieu
cua dang » cua cong, cua ban
toan tai » doanh tai, toan ban, toan cao
toan tap » toan 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: ((ho chieu) OR (theo chieu)) tinh - toan doanh cua dang thuong dan ((toan tai) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) tinh - toan doanh cua dang thuong dan ((toan tai) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) tinh - toan doanh cua dang thuong dan ((toan tai) or (toan tap))*.