Perhaps you should try some spelling variations:
hoc thuyet » hoc chuyen
thuyet xac » thuyet va, thuyet bai
hang huong » hang luong, hoang phuong, bang phuong
thanh tra » thanh toan, thanh hoa
tra tuan » tran tuan, tra quan, tri tuan
dan can » dan chan, dan canh, dan ca
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuyet xac - thanh tra tuan ((hang huong) OR (hang thuong)) dan can cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thuyet xac - thanh tra tuan ((hang huong) OR (hang thuong)) dan can cau".
• Adding a wildcard symbol may retrieve word variants: hoc thuyet xac - thanh tra tuan ((hang huong) OR (hang thuong)) dan can cau*.