Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
trung van » truong van, trong van, trung va
van dung » van dong, xay dung, tin dung
trong ca » trong cac, trong nha
toan ban » van ban
ca toan » cua toan, va toan, bai toan

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 (dieu hanh)) - thanh trung van dung trong ca toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (dieu hanh)) - thanh trung van dung trong ca toan ban*.