Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, dien thanh
tien thanh » tien thinh, tran thanh, den thanh
hanh trung » thanh trung, hanh trang, manh trung
trung van » truong van, trong van, trung va
trong dan » trong dang, trong san, trong ban
trong tan » trong quan, trong cac, trong ca
van dung » van dong, xay dung, tin dung

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 nhanh) or (tien thanh)) - hanh trung van dung ((trong dan) OR (trong tan)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (tien thanh)) - hanh trung van dung ((trong dan) OR (trong tan)) phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) or (tien thanh)) - hanh trung van dung ((trong dan) OR (trong tan)) phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (tien thanh)) - hanh trung van dung ((trong dan) OR (trong tan)) phan tu*.