Perhaps you should try some spelling variations:
dong thuong » cong thuong, dong thong, dung thuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thuong dan » huong dan, thuong han, thuong dam
tranh cua » manh cua
doanh cua » doanh luan
dan phan » doan phan, dan chan, van phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - canh ((tranh cua) or (doanh cua)) dong thuong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh ((tranh cua) OR (doanh cua)) dong thuong dan phan tu.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh ((tranh cua) or (doanh cua)) dong thuong dan phan tu*.