Perhaps you should try some spelling variations:
luan thuong » luat thuong, lan thuong, luan phuong
thuong dong » phuong dong, tuong dong, chuong dong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
hanh dung » anh dung, hanh dong, manh dung
dong tinh » dong kinh, dong tin, cong tinh
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: theo chieu sach - ((hanh dung) OR (thanh dung)) luan thuong dong tinh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((hanh dung) OR (thanh dung)) luan thuong dong tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh dung) OR (thanh dung)) luan thuong dong tinh toan ban*.