Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, kieu tinh
nhung cong » dung cong, thong cong, hang cong
hanh than » hanh han, hanh nhan, hanh phan
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
than cua » nhan cua, thai cua, ban cua
dan toan » van toan, dan than, xuan toan

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: ho ((chieu tinh) OR (trieu tinh)) - hanh than cua nhung cong ((dan toan) OR (manh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tinh) or (trieu tinh)) - hanh than cua nhung cong ((dan toan) OR (manh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tinh) or (trieu tinh)) - hanh than cua nhung cong ((dan toan) OR (manh toan)) cau*.