Perhaps you should try some spelling variations:
trung cong » truong cong, trong cong, trung uong
chieu xanh » chieu sach, chieu sang, chieu tinh
hien xanh » hien hanh, hien nhanh, hien khanh
hanh tang » hanh trang, anh tang, hanh mang
cua trung » cua truong, xuan trung, cua nhung
tang cua » mang cua, hang cua, tang luan
cong van » cong vang, cong san, song van
tai cau » tai cac
tai cao » thai cao, tao cao, tai sao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - hanh tang cua trung cong van ((tai cau) OR (tai cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu xanh)) - hanh tang cua trung cong van ((tai cau) OR (tai cao))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh tang cua trung cong van ((tai cau) OR (tai cao))*.