Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
chu xanh » chu manh, chieu xanh, chua xang
tang cua » mang cua, hang cua, tang luan
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu xanh) or (chieu sach)) - hanh tang cua nhung cong ((dan toan) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chieu sach)) - hanh tang cua nhung cong ((dan toan) OR (tinh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chieu sach)) - hanh tang cua nhung cong ((dan toan) or (tinh toan)) cau*.