Perhaps you should try some spelling variations:
thanh trung » thanh tung
trong huong » trong thuong, trong chuong, truong huong
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
trung qua » trung quan, trong qua, trung cua
qua trong » quan trong, qua trinh, qua song
dan toan » van toan, dan than, manh toan
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 ((hien xanh) or (hien nhanh)) - thanh trung qua trong huong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - thanh trung qua trong huong dan toan ban*.