Perhaps you should try some spelling variations:
dong thuong » cong thuong, dong thong, dung thuong
hanh trinh » canh tranh, hanh chinh
thieu xanh » chieu xanh, hieu manh, thien anh
trinh quan » tinh quang, trinh luat, trinh han
thuong dan » huong dan, thuong han, thuong dam
quan dong » quang dong, quan long, quan hoang
tien anh » tieng anh, tien manh, dien anh
toan cao » toan tap
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 ((thieu xanh) or (tien anh)) - hanh trinh quan dong thuong dan ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (tien anh)) - hanh trinh quan dong thuong dan ((toan cao) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (tien anh)) - hanh trinh quan dong thuong dan ((toan cao) OR (toan ban))*".