Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hien hanh » dieu hanh
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
dan toan » van toan, dan than, manh toan
mang va » mang vua, hang va, bang va
va dung » van dung, va duong, vat dung
van tan » van tuan, van ban, van tai

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 hanh) or (chieu sang)) - hanh mang va dung cong ((dan toan) or (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (chieu sang)) - hanh mang va dung cong ((dan toan) OR (van tan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (chieu sang)) - hanh mang va dung cong ((dan toan) or (van tan)) cau*.