Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
tang cua » mang cua, hang cua, tang luan
van than » van thanh, van thang, van tuan
than cau » toan cau, phan cau, than cap

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)) - hanh tang cua ((dung cong) or (hang cong)) van than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - hanh tang cua ((dung cong) OR (hang cong)) van than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien nhanh)) - hanh tang cua ((dung cong) or (hang cong)) van than cau*.